Difference between revisions of "API:EPrints/DataObj/Document"

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This page has been automatically generated from the EPrints 3.4 source. Any wiki changes made between the 'Pod2Wiki=*' and 'Edit below this comment' comments will be lost.
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-->{{API}}{{Pod2Wiki}}{{API:Source|file=EPrints/DataObj/Document.pm|package_name=EPrints::DataObj::Document}}[[Category:API|DOCUMENT]][[Category:API:EPrints/DataObj|DOCUMENT]]<div><!-- Edit below this comment -->
  
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<!-- Pod2Wiki=_private_ --><!-- Pod2Wiki=head_name -->
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==NAME==
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'''EPrints::DataObj::Document''' - A single format of a record.
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==DESCRIPTION==
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Document represents a single format of an EPrint (eg. PDF) - the  actual file(s) rather than the metadata.
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Inherits from [[API:EPrints/DataObj/SubObject|EPrints::DataObj::SubObject]], which in turn inherits from [[API:EPrints/DataObj|EPrints::DataObj]].
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==INSTANCE VARIABLES==
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See [[API:EPrints/DataObj#INSTANCE_VARIABLES|EPrints::DataObj#INSTANCE_VARIABLES]].
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==CORE METADATA FIELDS==
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</div>
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<!-- Pod2Wiki=item_docid -->
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===docid (int)===
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The unique ID of the document.
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<!-- Pod2Wiki=item_rev_number -->
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===rev_number (int)===
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The revision number of this document record.
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</div>
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<!-- Pod2Wiki=item_pos -->
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===pos (int)===
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The position of the document record within those associated with the  eprint.
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===placement (int)===
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Placement of the document - the order documents in which should be  shown.  This may be different to <tt>pos</tt>, as the <tt>ultimate_doc_pos</tt>  may lead to a different ordering.
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<!-- Pod2Wiki=item_format -->
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===format (namedset)===
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The format of this document. One of the types of the namedset c&lt;document&gt;.
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===formatdesc (text)===
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An additional description of this document. For example the specific  version of a format.
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<!-- Pod2Wiki=item_language -->
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===language (namedset)===
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The ISO 639-1 code of the language of this document. The default  configuration of EPrints does not set this.
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<!-- Pod2Wiki=item_security -->
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===security (namedset)===
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The security type of this document - who can view it. One of the  types of the namedset <tt>security</tt>.
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===license (namedset)===
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The license applied of this document - who can view it. One of the  types of the namedset <tt>license</tt>.
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===main (text)===
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The file which we should link to. For something like a PDF file this is the only file. For an HTML document with images it would be the name of the actual HTML file.
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<!-- Pod2Wiki=item_date_embargo -->
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===date_embargo (date)===
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The date until which the document has restricted access (set by  <tt>security</tt>).  At which point the embargo is lifted and <tt>security</tt> is set to <tt>public</tt> and this field set back to <tt>undef</tt>.
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Requires <tt>bin/lift_embargos</tt> script to be deployed as a cron job.
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===date_embargo_retained (date)===
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The retained date of any embargo originally placed on this document. This is updated when a user modifies <tt>date_embargo</tt> but is not unset by the <tt>bin/lift_embargos</tt> script.
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<!-- Pod2Wiki=item_media -->
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===media (compound)===
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A compound field containing a description of the document media - dimensions, codec etc.
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<!-- Pod2Wiki=head_references_and_related_objects -->
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==REFERENCES AND RELATED OBJECTS ==
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<!-- Pod2Wiki=item_eprintid -->
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===eprintid (itemref)===
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The ID number of the eprint to which this document belongs.
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<!-- Pod2Wiki=item_files -->
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===files (subobject, multiple)===
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A virtual field which represents the list of files which are part of this record.
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<!-- Pod2Wiki=item_relation -->
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===relation (relation, multiple)===
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Predicated relationships between this document and other data objects within the archive.
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<!-- Pod2Wiki=head_methods -->
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==METHODS==
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<!-- Pod2Wiki=head_constructor_methods -->
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===Constructor Methods===
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<!-- Pod2Wiki=item_create -->
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====create====
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 +
$doc = EPrints::DataObj::Document::create( $session, $eprint )
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Create and return a new document belonging to the given <tt>$eprint</tt>  object.
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N.B. This creates the document in the database, not just in memory.
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<!-- Pod2Wiki=item_create_from_data -->
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====create_from_data====
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$dataobj = EPrints::DataObj::Document::create_from_data( $session, $data, $dataset )
 +
Create document data object from <tt>$data</tt> provided.
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Returns <tt>undef</tt> if a bad (or no) <tt>eprintid</tt> specified in <tt>$data</tt>.
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Otherwise calls the parent method in [[API:EPrints/DataObj|EPrints::DataObj]].
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<!-- Pod2Wiki=head_class_methods -->
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===Class Methods===
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<!-- Pod2Wiki=item_get_system_field_info -->
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====get_system_field_info====
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$fields = EPrints::DataObj::Document-&gt;get_system_field_info
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Returns an array describing the system metadata of the document  dataset.
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<!-- Pod2Wiki=item_get_defaults -->
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====get_defaults====
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$defaults = EPrints::DataObj::Document-&gt;get_defaults( $session, $data, $dataset )
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Returns default values for this data object based on the starting  <tt>$data</tt>.
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<!-- Pod2Wiki=item_get_dataset_id -->
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====get_dataset_id====
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$dataset = EPrints::DataObj::Document-&gt;get_dataset_id
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Returns the ID of the [[API:EPrints/DataSet|EPrints::DataSet]] object to which this record  belongs.
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<!-- Pod2Wiki=item_get_parent_dataset_id -->
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====get_parent_dataset_id====
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$dataset_id = EPrints::DataObj::Document-&gt;get_parent_dataset_id
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Returns the ID of the parent dataset for a document, (i.e. <tt>eprint</tt>).
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<!-- Pod2Wiki=head_object_methods -->
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===Object Methods===
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<!-- Pod2Wiki=item_clone -->
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====clone====
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$newdoc = $doc-&gt;clone( $eprint )
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Attempt to clone this document. Both the document metadata and the actual files. The clone will be associated with the given <tt>$eprint</tt>.
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Returns to the newly colument document.
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<!-- Pod2Wiki=item_remove -->
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====remove====
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$success = $doc-&gt;remove
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Attempt to completely delete this document. Including derived  documents such as thumbnails.
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Returns boolean dependent on success of deleting document.
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<!-- Pod2Wiki=item_get_eprint -->
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====get_eprint====
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$eprint = $doc-&gt;get_eprint
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Returns the eprint this document is associated with.
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Alias for:
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$doc-&gt;get_parent
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<!-- Pod2Wiki=item_get_baseurl -->
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====get_baseurl====
 +
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$url = $doc-&gt;get_baseurl
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Returns the base URL of the document.
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<!-- Pod2Wiki=item_is_public -->
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====is_public====
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$boolean = $doc-&gt;is_public
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Returnes <tt>true</tt> if this document has no security set and is in the  live archive. Otherwise, returns <tt>false</tt>.
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<!-- Pod2Wiki=item_path -->
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====path====
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$path = $doc-&gt;path
 +
Returns the relative path to the document without specifying any file.
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<!-- Pod2Wiki=item_file_path -->
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====file_path====
 +
 +
$path = $doc-&gt;file_path( [ $file ] )
 +
Returns the relative path to <tt>$file</tt> stored in this document.  If <tt>$file</tt> is undefined returns the path to the main file.
 +
 +
This is an efficient shortcut to this:
 +
 +
my $file = $doc-&gt;stored_file( $filename );
 +
my $path = $file-&gt;path;
 +
 
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<!-- Pod2Wiki=item_get_url -->
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====get_url====
 +
 +
$url = $doc-&gt;get_url( [ $file ] )
 +
Returns the full URL of the document.
 +
 +
If <tt>$file</tt> is not specified then the main file is used.
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 +
<!-- Pod2Wiki=item_local_path -->
 +
====local_path====
 +
 +
$path = $doc-&gt;local_path
 +
DEPRECATED.
 +
 +
Returns the full path of the directory where this document is stored in the filesystem.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_files -->
 +
====files====
 +
 +
%files = $doc-&gt;files
 +
Returns a hash, the keys of which are all the files belonging to this document (relative to [[API:EPrints/DataObj/Document#local_path|local_path]]). The values are the sizes of the  files in bytes.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_remove_file -->
 +
====remove_file====
 +
 +
$success = $doc-&gt;remove_file( $filename )
 +
Attempts to remove the file with <tt>$filename</tt>. <tt>$filename</tt> must be  specified in the format that can be retrieved by [[API:EPrints/DataObj/Document#get_stored_file|get_stored_file]].
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_set_main -->
 +
====set_main====
 +
 +
$doc-&gt;set_main( $main_file )
 +
Sets <tt>main</tt> for the document to the named <tt>$main_file</tt> and adjusts  <tt>format</tt> and <tt>mime_type</tt> as necessary. Will not affect the database  until the document is committed.
 +
 +
Unsets <tt>main</tt> if <tt>$main_file</tt> is undefined.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_get_main -->
 +
====get_main====
 +
 +
$filename = $doc-&gt;get_main
 +
Returns the filename of the file set as <tt>main</tt> in this document.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_set_format -->
 +
====set_format====
 +
 +
$doc-&gt;set_format( $format )
 +
Set format for document to <tt>$format</tt>. Will not affect the database  until document is committed.
 +
 +
Alias for:
 +
 +
$doc-&gt;set_value( "format" , $format );
 +
 
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_set_format_desc -->
 +
====set_format_desc====
 +
 +
$doc-&gt;set_format_desc( $format_desc )
 +
Set format description for document to <tt>$format_desc</tt>. Will not  affect the database until document is committed.
 +
 +
Alias for:
 +
 +
$doc-&gt;set_value( "format_desc" , $format_desc );
 +
 
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_upload -->
 +
====upload====
 +
 +
$success = $doc-&gt;upload( $filehandle, $filename, [ $preserve_path, $filesize ] )
 +
DEPRECATED - Use [[API:EPrints/DataObj/Document#add_file|add_file]], which will automatically identify the  file type.
 +
 +
Upload the contents of the given <tt>$filehandle</tt> into this document as the given <tt>$filename</tt>.
 +
 +
If <tt>$preserve_path</tt> then make any subdirectories needed, otherwise  place this in the top level directory.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_add_file -->
 +
====add_file====
 +
 +
$fileobj = $doc-&gt;add_file( $file, $filename, [ $preserve_path ] )
 +
<tt>$file</tt> is the full path to a file to be added to the document, with name <tt>$filename</tt>. <tt>$filename</tt> is passed through  [[API:EPrints/System#sanitise|EPrints::System#sanitise]] before being written.
 +
 +
If <tt>$preserve_path</tt> is <tt>tru</tt>e then include path components in  <tt>$filename</tt>.
 +
 +
Returns the file object if successfully created or <tt>undef</tt> on  failure.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_upload_archive -->
 +
====upload_archive====
 +
 +
$success = $doc-&gt;upload_archive( $filehandle, $filename, $archive_format )
 +
DEPRECATED - use [[API:EPrints/DataObj/Document#add_archive|add_archive]].
 +
 +
Upload the file contents provided through <tt>$filehandle</tt> using the filename from <tt>$filename</tt>. How to deal with the specified  <tt>$archive_format</tt> (e.g. <tt>.zip</tt>, <tt>.tar.gz</tt>) is configured in  [[API:EPrints/SystemSettings|EPrints::SystemSettings]].
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_add_archive -->
 +
====add_archive====
 +
 +
$success = $doc-&gt;add_archive( $file, $archive_format )
 +
Adds the contents of that archive <tt>$file</tt> to the document, where  <tt>$archive_format</tt> is the format of the archive file (e.g. <tt>.zip</tt>, <tt>.tar.gz</tt>, etc.)
 +
 +
Returns a boolean dependent on whether the contents of the archive  file is added to the document's subdirectory on the filesystem.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_add_directory -->
 +
====add_directory====
 +
 +
$success = $doc-&gt;add_directory( $directory )
 +
Upload the contents of <tt>$directory</tt> to this document. This will not  set the document's <tt>main</tt> field.
 +
 +
This method expects <tt>$directory</tt> to have a trailing slash <tt>/</tt>.
 +
 +
Returns boolean depending on success of adding directory to document.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_upload_url -->
 +
====upload_url====
 +
 +
$success = $doc-&gt;upload_url( $url )
 +
Attempts to grab files from the given <tt>$url</tt> over HTTP. Grabbing  files this way is always problematic. Therefore, by default, only  relative links will be followed and only links to files in the same  directory or subdirectory will be followed.
 +
 +
This method by default uses {{API:PodLink|file=https:|package_name=https:|section=|text=wget}}.  However, you can modify this in [[API:EPrints/SystemSettings|EPrints::SystemSettings]].
 +
 +
Returns a boolean dependent of whether file(s) were successfully uploaded.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_commit -->
 +
====commit====
 +
 +
$success = $doc-&gt;commit( [ $force ] )
 +
Commit any changes that have been made to this data object to the database.
 +
 +
Calls <tt>set_document_automatic_fields</tt> in the archive's configuration  first to set any automatic fields that may be needed.
 +
 +
If <tt>$force</tt> is defined and <tt>true</tt> then still commit even if there  are no non-volatile changes.
 +
 +
Returns boolean depending on whether commit of document data object is successful.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_get_derived_versions -->
 +
====get_derived_versions====
 +
 +
@derived_docs = $doc-&gt;get_derived_versions
 +
Returns an array of documents that are derived from the current document through the <tt>isVersionOf</tt> relation.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_validate -->
 +
====validate====
 +
 +
$problems = $doc-&gt;validate( [ $for_archive ] )
 +
Validates the document data object.  If <tt>$for_archive</tt> is defined  this will be passed through to the archive configured  <tt>validate_document</tt> method, in case it is required for bespoke  changes to this method.
 +
 +
Returns a reference to an array of XHTML DOM objects describing  validation problems with the entire document, including the metadata  and repository config specific requirements.
 +
 +
A returned reference to an empty array indicates no problems.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_user_can_view -->
 +
====user_can_view====
 +
 +
$boolean = $doc-&gt;user_can_view( $user )
 +
Returns <tt>true</tt> if this document's security settings allow the given  <tt>$user</tt> access to view it.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_get_type -->
 +
====get_type====
 +
 +
$type = $doc-&gt;get_type
 +
Returns the type of this document.
 +
 +
Alias for:
 +
 +
$doc-&gt;value( "format" );
 +
 
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_queue_files_modified -->
 +
====queue_files_modified====
 +
 +
$doc-&gt;queue_files_modified
 +
Adds a <tt>files_modified</tt> task (e.g. for creating/updating thumbnails) to the event queue.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_files_modified -->
 +
====files_modified====
 +
 +
$doc-&gt;files_modified
 +
This method does all the things that need doing when a file has been modified.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_rehash -->
 +
====rehash====
 +
 +
$doc-&gt;rehash
 +
Recalculate the hash value of the document. Uses MD5 of the files (in alphabetic order), but can use user-specified hashing function  instead.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_make_indexcodes -->
 +
====make_indexcodes====
 +
 +
$indexcodes_doc = $doc-&gt;make_indexcodes
 +
Make the index codes document for this document. Returns the generated  index codes document on success or <tt>undef</tt> on failure.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_remove_indexcodes -->
 +
====remove_indexcodes====
 +
 +
$doc = $doc-&gt;remove_indexcodes
 +
Remove any documents containing index codes for this document.  Returns the number of documents removed.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_cache_file -->
 +
====cache_file====
 +
 +
$filename = $doc-&gt;cache_file( $suffix );
 +
DEPRECATED
 +
 +
Returns a cache filename for this document with the given <tt>$suffix</tt>.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_register_parent -->
 +
====register_parent====
 +
 +
$doc-&gt;register_parent( $parent )
 +
Registers the <tt>$parent</tt> [[API:EPrints/DataObj/EPrint|EPrints::DataObj::EPrint]] object for this  document.
 +
 +
This may cause reference loops, but it does avoid two identical eprint data objects existing at once.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_thumbnail_url -->
 +
====thumbnail_url====
 +
 +
$doc-&gt;thumbnail_url( $size )
 +
Returns the URL for the thumbnail of the document for a specified <tt>$size</tt>.  If <tt>$size</tt> is unspecified defaults to <tt>small</tt>. Other  values for <tt>$size</tt> include <tt>medium</tt> and <tt>preview</tt>.
 +
 +
Returns <tt>undef</tt> if file for particular type of thumbnail does not exist.
 +
 +
This method is called bt [[API:EPrints/DataObj/Document#icon_url|icon_url]].  It is best to use that method to reliably retrieve the required URL.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_icon_url -->
 +
====icon_url====
 +
 +
$doc-&gt;icon_url( $size )
 +
Returns the URL for the icon of the document for a specified <tt>$size</tt>.  If <tt>$size</tt> is unspecified defaults to <tt>small</tt>. Other values for <tt>$size</tt> include <tt>medium</tt> and <tt>preview</tt>.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_render_icon_link -->
 +
====render_icon_link====
 +
 +
$frag = $doc-&gt;render_icon_link( %opts )
 +
Render a link to the icon for this document.
 +
 +
Options:
 +
 +
new_window =&gt; 1 - Make link go to <tt>_blank</tt> not current window.
 +
 
 +
preview =&gt; 1 - If possible, provide a preview pop-up.
 +
 
 +
public =&gt; 0 - Show thumbnail/preview only on public documents.
 +
 
 +
public =&gt; 1 - Show thumbnail/preview on all documents if possible.
 +
 
 +
with_link =&gt; 0 - Do not link.
 +
 
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_render_preview_link -->
 +
====render_preview_link====
 +
 +
$frag = $doc-&gt;render_preview_link( %opts )
 +
Render a link to the preview for this document (if available) using a  lightbox.
 +
 +
Options:
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_caption_frag -->
 +
====caption_frag====
 +
 +
caption =&gt; $frag
 +
XHTML fragment to use as the caption, defaults to empty.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_set_name -->
 +
====set_name====
 +
 +
set =&gt; "name"
 +
The name of the set this document belongs to, defaults to none  (preview won't be shown as part of a set).
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_thumbnail_plugin -->
 +
====thumbnail_plugin====
 +
 +
$plugin = $doc-&gt;thumbnail_plugin( $size )
 +
Returns the plugin used to generatee thumbnails of the specified  <tt>$size</tt>.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_thumbnail_path -->
 +
====thumbnail_path====
 +
 +
$path = $doc-&gt;thumbnail_path
 +
DEPRECATED
 +
 +
Returns the filesystem path to location of thumbnails for the  document.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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<span style='display:none'>User Comments</span>
 +
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 +
 +
 +
<!-- Pod2Wiki= -->
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</div>
 +
<!-- Pod2Wiki=item_thumbnail_types -->
 +
====thumbnail_types====
 +
 +
$doc-&gt;thumbnail_types
 +
Returns array containing names of all the thumbnail types available  for this document.
 +
 +
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<span style='display:none'>User Comments</span>
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_remove_thumbnails -->
 +
====remove_thumbnails====
 +
 +
$doc-&gt;remove_thumbnails
 +
Removes all thumbnail files associated with this document.
 +
 +
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<span style='display:none'>User Comments</span>
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_make_thumbnails -->
 +
====make_thumbnails====
 +
 +
$doc-&gt;make_thumbnails
 +
Make all the thumbnail files required for this document.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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<span style='display:none'>User Comments</span>
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 +
<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_mime_type -->
 +
====mime_type====
 +
 +
$mime_type = $doc-&gt;mime_type
 +
DEPRECATED - use <tt>$doc-&gt;value( "mime_type" )</tt>
 +
 +
Returns the MIME type of this document.
 +
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<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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<span style='display:none'>User Comments</span>
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_get_parent_id -->
 +
====get_parent_id====
 +
 +
$eprintid = $doc-&gt;get_parent_id
 +
Returns the ID of the parent for this document, (i.e. the eprint ID).
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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<span style='display:none'>User Comments</span>
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<!-- Edit below this comment -->
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 +
 +
<!-- Pod2Wiki= -->
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</div>
 +
<!-- Pod2Wiki=item_add_relation -->
 +
====add_relation====
 +
 +
$doc-&gt;add_relation( $tgt, @types )
 +
Add one or more relations with type(s) specified by <tt>@types</tt> to the  document data object and pointing to the <tt>$tgt</tt> data object. 
 +
 +
This will not update the <tt>$tgt</tt> data object even if reflexive relations exist.
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<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_remove_relation -->
 +
====remove_relation====
 +
 +
$doc-&gt;remove_relation( $tgt, [ @types ] )
 +
Removes the relations for the document data object to the <tt>$tgt</tt> data  object. If <tt>@types</tt> is not defined, remove all relations to <tt>$tgt</tt>.  If <tt>$tgt</tt> is also undefined removes all relations given in <tt>@types</tt>.
 +
 +
If both <tt>$tgt</tt>, and <tt>@types</tt> are both undefined no relations will be  removed. If you want to remove all relations do:
 +
 +
$doc-&gt;set_value( "relation", [] );
 +
 
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<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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<span style='display:none'>User Comments</span>
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_has_relation -->
 +
====has_relation====
 +
 +
$bool = $doc-&gt;has_relation( $tgt, [ @types ] )
 +
Returns <tt>true</tt> if document data object has relations to <tt>$tgt</tt>. If  <tt>@types</tt> is also given, check these relations satisfy all of the  given types. If <tt>$tgt</tt> is undefined, relations that satisfy the given types may be to any data object.
 +
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<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
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 +
<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_search_related -->
 +
====search_related====
 +
 +
$list = $doc-&gt;search_related( [ $type ] )
 +
Returns an [[API:EPrints/List|EPrints::List]] that contains all document data objects  related to this document data object. If <tt>$type</tt> is defined return  only those document data object related by that type.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
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 +
<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_render_citation_link -->
 +
====render_citation_link====
 +
 +
$citation = $doc-&gt;render_citation_link( $style, %params )
 +
Returns a XHTML DOM citation rendering of the document data object. Using citation <tt>$style</tt> and <tt>%params</tt> provided and setting class for DOM parent element to <tt>ep_document_link</tt>.
 +
 +
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 +
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
 +
 +
 +
<!-- Pod2Wiki= -->
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</div>
 +
<!-- Pod2Wiki=item_render_video_preview -->
 +
====render_video_preview====
 +
 +
$frag = $doc-&gt;render_video_preview( $css_class )
 +
Returns a XHTML DOM fragment rendering of a HTML5 video preview with  optional subtitles.  Assigning the <tt>$css_class</tt> to the parent element  if the XHTML DOM fragment, if provided.
 +
 +
Access / security concerns should be addressed at a higher level.
 +
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<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
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<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_permit -->
 +
====permit====
 +
 +
$boolean = $doc-&gt;permit( $priv, $user )
 +
Returns boolean depending on whether the <tt>$user</tt> has the privilege  <tt>$priv</tt> to carry out a particular action on this document data  object.
 +
 +
See [[API:EPrints/DataObj#permit|EPrints::DataObj#permit]].
 +
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<span style='display:none'>User Comments</span>
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<!-- Edit below this comment -->
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</div>
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<!-- Pod2Wiki=head_utility_methods -->
 +
===Utility Methods===
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</div>
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<!-- Pod2Wiki=item_doc_with_eprintid_and_pos -->
 +
====doc_with_eprintid_and_pos====
 +
 +
EPrints::DataObj::doc_with_eprintid_and_pos( $repository, $eprintid, $pos )
 +
Find the document for an eprint based on the <tt>$eprintid</tt> and <tt>$pos</tt> values supplied matching the document's corresponding fields.
 +
 +
Returns the document data object matching the criteria. Otherwise, checks <tt>dark_document</tt> dataset if it exists to find a corresponding match.
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_main_input_tags -->
 +
====main_input_tags====
 +
 +
EPrints::DataObj::Document::main_input_tags( $session, $object )
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=item_main_render_option -->
 +
====main_render_option====
 +
 +
EPrints::DataObj::main_render_option( $session, $object )
 +
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<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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</div>
 +
<!-- Pod2Wiki=item_sanitise -->
 +
====sanitise====
 +
 +
$cleanfilename = EPrints::DataObj::Document::sanitise( $filename )
 +
Sanitises filename by replacing invalid characters. Mainly uses [[API:EPrints/System#sanitise|EPrints::System#sanitise]] but also replaces <tt>/</tt> with <tt>_</tt> to  ensure these do not get confused as a separator between direectories.
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<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=head_see_also -->
 +
==SEE ALSO==
 +
[[API:EPrints/DataObj/SubObject|EPrints::DataObj::SubObject]], [[API:EPrints/DataObj|EPrints::DataObj]] and  [[API:EPrints/DataSet|EPrints::DataSet]].
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<span style='display:none'>User Comments</span>
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<!-- Edit below this comment -->
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<!-- Pod2Wiki= -->
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</div>
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<!-- Pod2Wiki=head_copyright -->
 +
==COPYRIGHT==
 +
{{API:Copyright}}
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</div>
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<!-- Pod2Wiki=_postamble_ --><!-- Edit below this comment -->

Latest revision as of 00:38, 3 January 2022

EPrints 3 Reference: Directory Structure - Metadata Fields - Repository Configuration - XML Config Files - XML Export Format - EPrints data structure - Core API - Data Objects


API: Core API

Latest Source Code (3.4, 3.3) | Revision Log | Before editing this page please read Pod2Wiki


Contents

NAME

EPrints::DataObj::Document - A single format of a record.

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DESCRIPTION

Document represents a single format of an EPrint (eg. PDF) - the actual file(s) rather than the metadata.

Inherits from EPrints::DataObj::SubObject, which in turn inherits from EPrints::DataObj.

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INSTANCE VARIABLES

See EPrints::DataObj#INSTANCE_VARIABLES.

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CORE METADATA FIELDS

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docid (int)

The unique ID of the document.

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rev_number (int)

The revision number of this document record.

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pos (int)

The position of the document record within those associated with the eprint.

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placement (int)

Placement of the document - the order documents in which should be shown. This may be different to pos, as the ultimate_doc_pos may lead to a different ordering.

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format (namedset)

The format of this document. One of the types of the namedset c<document>.

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formatdesc (text)

An additional description of this document. For example the specific version of a format.

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language (namedset)

The ISO 639-1 code of the language of this document. The default configuration of EPrints does not set this.

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security (namedset)

The security type of this document - who can view it. One of the types of the namedset security.

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license (namedset)

The license applied of this document - who can view it. One of the types of the namedset license.

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main (text)

The file which we should link to. For something like a PDF file this is the only file. For an HTML document with images it would be the name of the actual HTML file.

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date_embargo (date)

The date until which the document has restricted access (set by security). At which point the embargo is lifted and security is set to public and this field set back to undef.

Requires bin/lift_embargos script to be deployed as a cron job.

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date_embargo_retained (date)

The retained date of any embargo originally placed on this document. This is updated when a user modifies date_embargo but is not unset by the bin/lift_embargos script.

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media (compound)

A compound field containing a description of the document media - dimensions, codec etc.

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REFERENCES AND RELATED OBJECTS

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eprintid (itemref)

The ID number of the eprint to which this document belongs.

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files (subobject, multiple)

A virtual field which represents the list of files which are part of this record.

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relation (relation, multiple)

Predicated relationships between this document and other data objects within the archive.

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METHODS

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Constructor Methods

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create

$doc = EPrints::DataObj::Document::create( $session, $eprint ) 

Create and return a new document belonging to the given $eprint object.

N.B. This creates the document in the database, not just in memory.

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create_from_data

$dataobj = EPrints::DataObj::Document::create_from_data( $session, $data, $dataset )

Create document data object from $data provided.

Returns undef if a bad (or no) eprintid specified in $data.

Otherwise calls the parent method in EPrints::DataObj.

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Class Methods

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get_system_field_info

$fields = EPrints::DataObj::Document->get_system_field_info

Returns an array describing the system metadata of the document dataset.

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get_defaults

$defaults = EPrints::DataObj::Document->get_defaults( $session, $data, $dataset )

Returns default values for this data object based on the starting $data.

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get_dataset_id

$dataset = EPrints::DataObj::Document->get_dataset_id

Returns the ID of the EPrints::DataSet object to which this record belongs.

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get_parent_dataset_id

$dataset_id = EPrints::DataObj::Document->get_parent_dataset_id

Returns the ID of the parent dataset for a document, (i.e. eprint).

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Object Methods

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clone

$newdoc = $doc->clone( $eprint )

Attempt to clone this document. Both the document metadata and the actual files. The clone will be associated with the given $eprint.

Returns to the newly colument document.

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remove

$success = $doc->remove

Attempt to completely delete this document. Including derived documents such as thumbnails.

Returns boolean dependent on success of deleting document.

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get_eprint

$eprint = $doc->get_eprint

Returns the eprint this document is associated with.

Alias for:

$doc->get_parent
 

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get_baseurl

$url = $doc->get_baseurl

Returns the base URL of the document.

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is_public

$boolean = $doc->is_public

Returnes true if this document has no security set and is in the live archive. Otherwise, returns false.

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path

$path = $doc->path

Returns the relative path to the document without specifying any file.

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file_path

$path = $doc->file_path( [ $file ] )

Returns the relative path to $file stored in this document. If $file is undefined returns the path to the main file.

This is an efficient shortcut to this:

my $file = $doc->stored_file( $filename );
my $path = $file->path;
 

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get_url

$url = $doc->get_url( [ $file ] )

Returns the full URL of the document.

If $file is not specified then the main file is used.

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local_path

$path = $doc->local_path

DEPRECATED.

Returns the full path of the directory where this document is stored in the filesystem.

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files

%files = $doc->files

Returns a hash, the keys of which are all the files belonging to this document (relative to local_path). The values are the sizes of the files in bytes.

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remove_file

$success = $doc->remove_file( $filename )

Attempts to remove the file with $filename. $filename must be specified in the format that can be retrieved by get_stored_file.

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set_main

$doc->set_main( $main_file )

Sets main for the document to the named $main_file and adjusts format and mime_type as necessary. Will not affect the database until the document is committed.

Unsets main if $main_file is undefined.

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get_main

$filename = $doc->get_main

Returns the filename of the file set as main in this document.

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set_format

$doc->set_format( $format )

Set format for document to $format. Will not affect the database until document is committed.

Alias for:

$doc->set_value( "format" , $format );
 

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set_format_desc

$doc->set_format_desc( $format_desc )

Set format description for document to $format_desc. Will not affect the database until document is committed.

Alias for:

$doc->set_value( "format_desc" , $format_desc );
 

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upload

$success = $doc->upload( $filehandle, $filename, [ $preserve_path, $filesize ] )

DEPRECATED - Use add_file, which will automatically identify the file type.

Upload the contents of the given $filehandle into this document as the given $filename.

If $preserve_path then make any subdirectories needed, otherwise place this in the top level directory.

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add_file

$fileobj = $doc->add_file( $file, $filename, [ $preserve_path ] )

$file is the full path to a file to be added to the document, with name $filename. $filename is passed through EPrints::System#sanitise before being written.

If $preserve_path is true then include path components in $filename.

Returns the file object if successfully created or undef on failure.

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upload_archive

$success = $doc->upload_archive( $filehandle, $filename, $archive_format )

DEPRECATED - use add_archive.

Upload the file contents provided through $filehandle using the filename from $filename. How to deal with the specified $archive_format (e.g. .zip, .tar.gz) is configured in EPrints::SystemSettings.

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add_archive

$success = $doc->add_archive( $file, $archive_format )

Adds the contents of that archive $file to the document, where $archive_format is the format of the archive file (e.g. .zip, .tar.gz, etc.)

Returns a boolean dependent on whether the contents of the archive file is added to the document's subdirectory on the filesystem.

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add_directory

$success = $doc->add_directory( $directory )

Upload the contents of $directory to this document. This will not set the document's main field.

This method expects $directory to have a trailing slash /.

Returns boolean depending on success of adding directory to document.

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upload_url

$success = $doc->upload_url( $url )

Attempts to grab files from the given $url over HTTP. Grabbing files this way is always problematic. Therefore, by default, only relative links will be followed and only links to files in the same directory or subdirectory will be followed.

This method by default uses wget. However, you can modify this in EPrints::SystemSettings.

Returns a boolean dependent of whether file(s) were successfully uploaded.

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commit

$success = $doc->commit( [ $force ] )

Commit any changes that have been made to this data object to the database.

Calls set_document_automatic_fields in the archive's configuration first to set any automatic fields that may be needed.

If $force is defined and true then still commit even if there are no non-volatile changes.

Returns boolean depending on whether commit of document data object is successful.

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get_derived_versions

@derived_docs = $doc->get_derived_versions

Returns an array of documents that are derived from the current document through the isVersionOf relation.

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validate

$problems = $doc->validate( [ $for_archive ] )

Validates the document data object. If $for_archive is defined this will be passed through to the archive configured validate_document method, in case it is required for bespoke changes to this method.

Returns a reference to an array of XHTML DOM objects describing validation problems with the entire document, including the metadata and repository config specific requirements.

A returned reference to an empty array indicates no problems.

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user_can_view

$boolean = $doc->user_can_view( $user )

Returns true if this document's security settings allow the given $user access to view it.

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get_type

$type = $doc->get_type

Returns the type of this document.

Alias for:

$doc->value( "format" );
 

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queue_files_modified

$doc->queue_files_modified

Adds a files_modified task (e.g. for creating/updating thumbnails) to the event queue.

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files_modified

$doc->files_modified

This method does all the things that need doing when a file has been modified.

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rehash

$doc->rehash

Recalculate the hash value of the document. Uses MD5 of the files (in alphabetic order), but can use user-specified hashing function instead.

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make_indexcodes

$indexcodes_doc = $doc->make_indexcodes

Make the index codes document for this document. Returns the generated index codes document on success or undef on failure.

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remove_indexcodes

$doc = $doc->remove_indexcodes

Remove any documents containing index codes for this document. Returns the number of documents removed.

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cache_file

$filename = $doc->cache_file( $suffix );

DEPRECATED

Returns a cache filename for this document with the given $suffix.

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register_parent

$doc->register_parent( $parent )

Registers the $parent EPrints::DataObj::EPrint object for this document.

This may cause reference loops, but it does avoid two identical eprint data objects existing at once.

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thumbnail_url

$doc->thumbnail_url( $size )

Returns the URL for the thumbnail of the document for a specified $size. If $size is unspecified defaults to small. Other values for $size include medium and preview.

Returns undef if file for particular type of thumbnail does not exist.

This method is called bt icon_url. It is best to use that method to reliably retrieve the required URL.

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icon_url

$doc->icon_url( $size )

Returns the URL for the icon of the document for a specified $size. If $size is unspecified defaults to small. Other values for $size include medium and preview.

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render_icon_link

$frag = $doc->render_icon_link( %opts )

Render a link to the icon for this document.

Options:

new_window => 1 - Make link go to _blank not current window.
 
preview => 1 - If possible, provide a preview pop-up.
 
public => 0 - Show thumbnail/preview only on public documents.
 
public => 1 - Show thumbnail/preview on all documents if possible.
 
with_link => 0 - Do not link.
 

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render_preview_link

$frag = $doc->render_preview_link( %opts )

Render a link to the preview for this document (if available) using a lightbox.

Options:

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caption_frag

caption => $frag

XHTML fragment to use as the caption, defaults to empty.

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set_name

set => "name"

The name of the set this document belongs to, defaults to none (preview won't be shown as part of a set).

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thumbnail_plugin

$plugin = $doc->thumbnail_plugin( $size )

Returns the plugin used to generatee thumbnails of the specified $size.

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thumbnail_path

$path = $doc->thumbnail_path

DEPRECATED

Returns the filesystem path to location of thumbnails for the document.

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thumbnail_types

$doc->thumbnail_types

Returns array containing names of all the thumbnail types available for this document.

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remove_thumbnails

$doc->remove_thumbnails

Removes all thumbnail files associated with this document.

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make_thumbnails

$doc->make_thumbnails

Make all the thumbnail files required for this document.

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mime_type

$mime_type = $doc->mime_type

DEPRECATED - use $doc->value( "mime_type" )

Returns the MIME type of this document.

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get_parent_id

$eprintid = $doc->get_parent_id

Returns the ID of the parent for this document, (i.e. the eprint ID).

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add_relation

$doc->add_relation( $tgt, @types )

Add one or more relations with type(s) specified by @types to the document data object and pointing to the $tgt data object.

This will not update the $tgt data object even if reflexive relations exist.

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remove_relation

$doc->remove_relation( $tgt, [ @types ] )

Removes the relations for the document data object to the $tgt data object. If @types is not defined, remove all relations to $tgt. If $tgt is also undefined removes all relations given in @types.

If both $tgt, and @types are both undefined no relations will be removed. If you want to remove all relations do:

$doc->set_value( "relation", [] );
 

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has_relation

$bool = $doc->has_relation( $tgt, [ @types ] )

Returns true if document data object has relations to $tgt. If @types is also given, check these relations satisfy all of the given types. If $tgt is undefined, relations that satisfy the given types may be to any data object.

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search_related

$list = $doc->search_related( [ $type ] )

Returns an EPrints::List that contains all document data objects related to this document data object. If $type is defined return only those document data object related by that type.

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render_citation_link

$citation = $doc->render_citation_link( $style, %params )

Returns a XHTML DOM citation rendering of the document data object. Using citation $style and %params provided and setting class for DOM parent element to ep_document_link.

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render_video_preview

$frag = $doc->render_video_preview( $css_class )

Returns a XHTML DOM fragment rendering of a HTML5 video preview with optional subtitles. Assigning the $css_class to the parent element if the XHTML DOM fragment, if provided.

Access / security concerns should be addressed at a higher level.

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permit

$boolean = $doc->permit( $priv, $user )

Returns boolean depending on whether the $user has the privilege $priv to carry out a particular action on this document data object.

See EPrints::DataObj#permit.

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Utility Methods

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doc_with_eprintid_and_pos

EPrints::DataObj::doc_with_eprintid_and_pos( $repository, $eprintid, $pos )

Find the document for an eprint based on the $eprintid and $pos values supplied matching the document's corresponding fields.

Returns the document data object matching the criteria. Otherwise, checks dark_document dataset if it exists to find a corresponding match.

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main_input_tags

EPrints::DataObj::Document::main_input_tags( $session, $object )

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main_render_option

EPrints::DataObj::main_render_option( $session, $object )

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sanitise

$cleanfilename = EPrints::DataObj::Document::sanitise( $filename )

Sanitises filename by replacing invalid characters. Mainly uses EPrints::System#sanitise but also replaces / with _ to ensure these do not get confused as a separator between direectories.

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SEE ALSO

EPrints::DataObj::SubObject, EPrints::DataObj and EPrints::DataSet.

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COPYRIGHT

© Copyright 2022 University of Southampton.

EPrints 3.4 is supplied by EPrints Services.

http://www.eprints.org/eprints-3.4/

LICENSE

This file is part of EPrints 3.4 http://www.eprints.org/.

EPrints 3.4 and this file are released under the terms of the GNU Lesser General Public License version 3 as published by the Free Software Foundation unless otherwise stated.

EPrints 3.4 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with EPrints 3.4. If not, see http://www.gnu.org/licenses/.

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