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

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<!-- Pod2Wiki=_preamble_  
 
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This page has been automatically generated from the EPrints source. Any wiki changes made between the 'Pod2Wiki=*' and 'End of Pod2Wiki' comments will be lost.
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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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  -->{{Pod2Wiki}}{{API:Source|file=EPrints/DataObj/MetaField.pm|package_name=EPrints::DataObj::MetaField}}[[Category:API|MetaField]]<!-- End of Pod2Wiki -->
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  -->{{API}}{{Pod2Wiki}}{{API:Source|file=EPrints/DataObj/MetaField.pm|package_name=EPrints::DataObj::MetaField}}[[Category:API|METAFIELD]][[Category:API:EPrints/DataObj|METAFIELD]]<div><!-- Edit below this comment -->
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<!-- Pod2Wiki=head_name -->=NAME=
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==NAME==
 
'''EPrints::DataObj::MetaField''' - metadata fields
 
'''EPrints::DataObj::MetaField''' - metadata fields
  
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<!-- Pod2Wiki=head_description -->=DESCRIPTION=
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<span style='display:none'>User Comments</span>
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This is an internal class that shouldn't be used outside [[API:EPrints/Database|EPrints::Database]].
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==DESCRIPTION==
 +
This is an internal class that should not be used outside [[API:EPrints/Database|EPrints::Database]].
 +
 
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==CORE METADATA FIELDS==
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<!-- Pod2Wiki=item_metafieldid -->
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===metafieldid (counter)===
 +
 
 +
The unique identifer for the metafield.
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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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<!-- Pod2Wiki=item_mfdatasetid -->
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===mfdatasetid (set)===
 +
 
 +
The dataset two which this metafield belongs.
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<!-- Pod2Wiki=item_name -->
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===name (text)===
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The name of this metafield.
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<!-- Pod2Wiki=item_type -->
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===type (set)===
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 +
The type of this metafield.
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<!-- Pod2Wiki=item_provenance -->
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===provenance (set)===
 +
 
 +
The provenance of this metafield.
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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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<!-- Pod2Wiki=item_phrase_name -->
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===phrase_name (multilang, multiple)===
 +
 
 +
The phrase name(s)(labels) potentially in multiple languages for  this metafield.
 +
 
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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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<!-- Pod2Wiki=item_phrase_help -->
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===phrase_help (multilang, multiple)===
 +
 
 +
The phrase help text(s) potentially in multiple languages for this metafield.
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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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<!-- Pod2Wiki=item_required -->
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===required (boolean)===
 +
 
 +
Whether this metafield is required for the dataset.
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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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<!-- Pod2Wiki=item_multiple -->
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===multiple (boolean)===
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 +
Whether this metafield can have multiple values for a data object.
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<!-- Pod2Wiki=item_allow_null -->
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===allow_null (boolean)===
 +
 
 +
Whether this metafield can have a null value.
 +
 
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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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<!-- Pod2Wiki=item_export_as_xml -->
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===export_as_xml (boolean)===
 +
 
 +
Whether this metafield can be exported in XML.
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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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<!-- Pod2Wiki=item_volatile -->
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===volatile (boolean)===
 +
 
 +
Whether this metafield stores a volatile data.
 +
 
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<!-- Pod2Wiki=item_min_resolution -->
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===min_resolution (set)===
 +
 
 +
The minimum time resolution (second, minute, hour, day, month or  year) for this metafield if it is a timestamp/datestamp.
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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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<!-- Pod2Wiki=item_sql_index -->
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===sql_index (boolean)===
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 +
Whether an SQL index should be created for this metafield.
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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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===render_input (text)===
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 +
A different or bespoke function to render the input field for this metafield.
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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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<!-- Pod2Wiki=item_render_value -->
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===render_value (text)===
 +
 
 +
A different or bespoke function to render the value for this  metafield.
 +
 
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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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<!-- Pod2Wiki=item_input_ordered -->
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===input_ordered (boolean)===
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 +
Whether the input for this metafield is ordered.
 +
 
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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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<!-- Pod2Wiki=item_maxlength -->
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===maxlength (int)===
 +
 
 +
The maximum length for this metafield if it is a text or subclass of a text field.
 +
 
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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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<!-- Pod2Wiki=item_browse_link -->
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===browse_link (boolean)===
 +
 
 +
The link to a browse view for this metafield if it is a subject metafield.
 +
 
 +
<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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===top (text)===
 +
 
 +
The top subject in the subject tree that should be used as  options for this subject metafield.
 +
 
 +
<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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<!-- Pod2Wiki=item_datasetid -->
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===datasetid (text)===
 +
 
 +
The dataset ID for this metafield, if it is a search, subobject, dataobjref, fields, itemref or file field.
 +
 
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<!-- Pod2Wiki=item_set_name -->
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===set_name (text)===
 +
 
 +
The name of the file that contains the options for this namedset metafield.
 +
 
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<!-- Pod2Wiki=item_options -->
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===options (text)===
 +
 
 +
The commas separated list of options for this set metafield.
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<!-- Pod2Wiki=head_methods -->=METHODS=
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<!-- Pod2Wiki=item_get_system_field_info -->==get_system_field_info==
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===render_order (set)===
  
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  $thing = EPrints::DataObj::MetaField-&gt;get_system_field_info
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The order to render a name if this metafield is for a name.
  
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Core fields.
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<!-- Pod2Wiki=head_constructor_methods -->==Constructor Methods==
 
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<!-- Pod2Wiki=item_new -->===new===
 
  
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  $thing = EPrints::DataObj::MetaField-&gt;new( $session, $metafieldid )
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<!-- Pod2Wiki=item_hide_honourific -->
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===hide_honourific (boolean)===
  
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The data object identified by $metafieldid.
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Whether to hide the honourfic sub-field if this is a name  metafield.
  
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<!-- Pod2Wiki=item_new_from_data -->===new_from_data===
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<!-- Edit below this comment -->
  
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  $thing = EPrints::DataObj::MetaField-&gt;new_from_data( $session, $known )
 
  
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A new <tt>EPrints::DataObj::MetaField</tt> object containing data $known (a hash reference).
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===hide_lineage (boolean)===
  
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Whether to hide the lineage sub-field if this is a name metafield.
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<!-- Pod2Wiki=item_get_perl_struct -->===get_perl_struct===
 
  
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  $data = EPrints::DataObj::MetaField-&gt;get_perl_struct
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<!-- Edit below this comment -->
  
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Returns the Perl data structure representation of this field, as you would find defined in the configuration or DataObj classes.
 
  
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<!-- Pod2Wiki=head_class_methods -->==Class Methods==
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<!-- Pod2Wiki=item_family_first -->
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<!-- Pod2Wiki=item_remove_all -->===remove_all===
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===family_first (boolean)===
  
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  EPrints::DataObj::MetaField::remove_all( $session )
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Whether to render the family name sub-field before the given name if this is a name metafield.
  
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Remove all records from the metafield dataset.
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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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<!-- Edit below this comment -->
  
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<!-- Pod2Wiki=item_get_defaults -->===get_defaults===
 
  
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  $defaults = EPrints::DataObj::MetaField-&gt;get_defaults( $session, $data )
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===input_style (set)===
  
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Return default values for this object based on the starting data.
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A particular style for displaying the input form element for this metafield.
  
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<!-- Pod2Wiki=head_object_methods -->==Object Methods==
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<!-- Edit below this comment -->
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<!-- Pod2Wiki=item_remove -->===remove===
 
  
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  $foo = $thing-&gt;remove()
 
  
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Remove this record from the data set (see [[API:EPrints/Database|EPrints::Database]]).
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===input_rows (int)===
  
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The number of input rows for this metafield.
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<!-- Pod2Wiki=item_remove_from_workflow -->===remove_from_workflow===
 
  
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  $ok = $mf-&gt;remove_from_workflow()
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<!-- Edit below this comment -->
  
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Remove all occurrences of this field from the workflow. Will remove the "local" stage if it is empty.
 
  
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<!-- Pod2Wiki=head_see_also -->=SEE ALSO=
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[[API:EPrints/DataObj|EPrints::DataObj]] and [[API:EPrints/DataSet|EPrints::DataSet]].
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===input_cols (int)===
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 +
The number of input columns for this metafield.
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<!-- Pod2Wiki=item_input_boxes -->
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===input_boxes (int)===
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 +
The number of input boxes for this metafield.
 +
 
 +
<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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<!-- Pod2Wiki=item_sql_counter -->
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===sql_counter (text)===
 +
 
 +
The name to give to the sql counter for this counter  metafield.  Typically the same as the metafield's name.
 +
 
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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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<!-- Pod2Wiki=item_default_value -->
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===default_value (text)===
 +
 
 +
The default value for this metafield.
 +
 
 +
<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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<!-- Pod2Wiki=head_references_and_related_objects -->
 +
==REFERENCES AND RELATED OBJECTS==
 +
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 +
<!-- Edit below this comment -->
 +
 
 +
 
 +
<!-- Pod2Wiki= -->
 +
</div>
 +
<!-- Pod2Wiki=item_parent -->
 +
===parent (itemref)===
 +
 
 +
The parent metafield this metafield belongs to, if it is a sub-field.
 +
 
 +
<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_fields -->
 +
===fields (subobject, multiple)===
 +
 
 +
Sub-fields of this metafield.
 +
 
 +
<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=head_instance_variables -->
 +
==INSTANCE VARIABLES==
 +
See [[API:EPrints/DataObj#INSTANCE_VARIABLES|EPrints::DataObj]].
 +
 
 +
<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=head_methods -->
 +
==METHODS==
 +
<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=head_utility_methods -->
 +
===Utility Methods===
 +
<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_dataset_ids -->
 +
====dataset_ids====
 +
 
 +
@ids = EPrints::DataObj::MetaField::dataset_ids( $repo )
 +
Returns array of all dataset IDs for non-virtual datasets in <tt>$repo</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_dataset_id -->
 +
====render_dataset_id====
 +
 
 +
$dataset_label = EPrints::DataObj::MetaField::render_dataset_id( $repo, $id )
 +
Returns XHTML DOM rendering of phrase for dataset with <tt>$id</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_options_fromform -->
 +
====options_fromform====
 +
 
 +
$options = EPrints::DataObj::MetaField::options_fromform( $value )
 +
Returns an array reference of options from the comma-separated  <tt>$value</tt> provided.
 +
 
 +
<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_options_toform -->
 +
====options_toform====
 +
 
 +
$options_str = EPrints::DataObj::MetaField::options_toform( $value )
 +
Returns a comma-separated string of options from the array reference <tt>$value</tt> provided.
 +
 
 +
<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_boolean_fromform -->
 +
====boolean_fromform====
 +
 
 +
$boolean = EPrints::DataObj::MetaField::boolean_fromform( $value )
 +
Returns <tt>true</tt> or <tt>false</tt>, (literally <tt>1</tt> or <tt>0</tt>) depending on the <tt>$value</tt> representation of a boolean in a form.
 +
 
 +
<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_boolean_toform -->
 +
====boolean_toform====
 +
 
 +
$boolean_str = EPrints::DataObj::MetaField::boolean_toform( $value )
 +
Returns a string representation of a boolean (<tt>"TRUE"</tt>, <tt>"FALSE"</tt> or <tt>undef</tt>) depending on the to form <tt>$value</tt> provided.
 +
 
 +
<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=head_constructor_methods -->
 +
===Constructor Methods===
 +
<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_new_from_field -->
 +
====new_from_field====
 +
 
 +
$metafield = EPrints::DataObj::MetaField-&gt;new_from_field( $repo, $field, [ $dataset ] )
 +
Returns a new metafield data object based on <tt>$field</tt>.
 +
 
 +
<tt>$dataset</tt> is determined from dataset ID of class (i.e. <tt>metafield</tt>) if unset.
 +
 
 +
<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=head_class_methods -->
 +
===Class Methods===
 +
<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_system_field_info -->
 +
====get_system_field_info====
 +
 
 +
$thing = EPrints::DataObj::MetaField-&gt;get_system_field_info
 +
Returns an array describing the system metadata fields of the metafield dataset.
 +
 
 +
<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_dataset_id -->
 +
====get_dataset_id====
 +
 
 +
$dataset = EPrints::DataObj::MetaField-&gt;get_dataset_id
 +
Returns the ID of the [[API:EPrints/DataSet|EPrints::DataSet]] object to which this record  belongs.
 +
 
 +
<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_parent_dataset_id -->
 +
====get_parent_dataset_id====
 +
 
 +
$dataset = EPrints::DataObj::MetaField-&gt;get_parent_dataset_id
 +
Returns the ID of the [[API:EPrints/DataSet|EPrints::DataSet]] object to which this  record's parent belongs.
 +
 
 +
<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_defaults -->
 +
====get_defaults====
 +
 
 +
$defaults = EPrints::DataObj::MetaField-&gt;get_defaults( $repo, $data, [ $dataset ] )
 +
Returns default values for this object based on the starting <tt>$data</tt>.
 +
 
 +
Get <tt>$dataset</tt> from class if not defined.
 +
 
 +
<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=head_object_methods -->
 +
===Object Methods===
 +
<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_property_defaults -->
 +
====get_property_defaults====
 +
 
 +
$defaults = $metafield-&gt;get_property_defaults( $repo, $type )
 +
Gets the property defaults for metafield <tt>$type</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_dump -->
 +
====dump====
 +
 
 +
$str = $metafield-&gt;dump
 +
Dump the fields configuration as used in <tt>cfg.d</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_get_parent_id -->
 +
====get_parent_id====
 +
 
 +
$parent = $metafield-&gt;get_parent_id
 +
Returns the parent ID for this metafield.
 +
 
 +
Alias for:
 +
 
 +
$metafield-&gt;value( "parent" );
 +
 
 +
<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 -->
 +
====remove====
 +
 
 +
$ok = $metafield-&gt;remove
 +
Remove the field and any sub-fields from the database.
 +
 
 +
<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_config_path -->
 +
====config_path====
 +
 
 +
$path = $metafield-&gt;config_path
 +
Returns the root directory of the repository configuration path.
 +
 
 +
<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_config_filename -->
 +
====config_filename====
 +
 
 +
$filename = $metafield-&gt;config_filename( $dataset )
 +
Returns the location of the cfg.d config file for the provided <tt>$dataset</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_phrases_filename -->
 +
====phrases_filename====
 +
 
 +
$filename = $metafield-&gt;phrases_filename( $langid )
 +
Returns the location of the XML phrases file for provided <tt>$lang</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_workflow_filename -->
 +
====workflow_filename====
 +
 
 +
$filename = $metafield-&gt;workflow_filename( $dataset )
 +
Returns the location of the workflow file for the provided  <tt>$dataset</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_add_to_phrases -->
 +
====add_to_phrases====
 +
 
 +
$ok = $metafield-&gt;add_to_phrases
 +
Adds the phrases defined by this metafield to the system.
 +
 
 +
<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_from_dataset -->
 +
====remove_from_dataset====
 +
 
 +
$ok = $metafield-&gt;remove_from_dataset
 +
Remove this metafield from the dataset specified by its <tt>mfdatasetid</tt> value.
 +
 
 +
Returns boolean dependent on success removing from the dataset.
 +
 
 +
<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_to_database -->
 +
====add_to_database====
 +
 
 +
$ok = $metafield-&gt;add_to_database
 +
Add this metafield to the database.
 +
 
 +
Returns boolean dependent on success adding to the database.
 +
 
 +
<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_from_database -->
 +
====remove_from_database====
 +
 
 +
$ok = $metafield-&gt;remove_from_database
 +
Remove this field from the database.
 +
 
 +
Returns boolean dependent on success removing from the database.
 +
 
 +
<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_to_workflow -->
 +
====add_to_workflow====
 +
 
 +
$ok = $metafield-&gt;add_to_workflow
 +
Add this metafield to the workflow in the <tt>Misc.</tt> section.
 +
 
 +
Returns boolean dependent on success adding to the workflow.
 +
 
 +
<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_from_workflow -->
 +
====remove_from_workflow====
 +
 
 +
$ok = $metafield-&gt;remove_from_workflow
 +
Remove all occurrences of this field from the workflow. Will remove  the <tt>local</tt> stage if it is empty.
 +
 
 +
Returns boolean dependent on success removing from the workflow.
 +
 
 +
<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_perl_struct -->
 +
====perl_struct====
 +
 
 +
$data = $metafield-&gt;perl_struct( $prefix )
 +
Returns the Perl data structure representation of this field, as you  would find defined in the configuration or [[API:EPrints/DataObj|EPrints::DataObj]]  classes.
 +
 
 +
If <tt>$prefix</tt> is defined returns the Perl data structure for the  fields property, where <tt>$prefix</tt> is the fieldname of the parent  field.
 +
 
 +
<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_field_object -->
 +
====make_field_object====
 +
 
 +
$field = $metafield-&gt;make_field_object
 +
Makes and returns a new field object based on this metafield.
 +
 
 +
<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_to_repository -->
 +
====add_to_repository====
 +
 
 +
$ok = $metafield-&gt;add_to_repository
 +
Adds this field to the repository.
 +
 
 +
Returns boolean dependent on success adding to the repository.
 +
 
 +
<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_from_repository -->
 +
====remove_from_repository====
  
−
<!-- End of Pod2Wiki -->
+
$ok = $mf-&gt;remove_from_repository
−
<!-- Pod2Wiki=head_undocumented_methods -->=UNDOCUMENTED METHODS=
+
Remove this field from the repository.
−
{{API:Undocumented Methods}}<!-- End of Pod2Wiki -->
 
−
<!-- Pod2Wiki=item_add_to_phrases -->==add_to_phrases==
 
  
−
<!-- End of Pod2Wiki -->
+
Returns boolean dependent on success removing from the repository.
−
<!-- Pod2Wiki=item_add_to_workflow -->==add_to_workflow==
 
  
−
<!-- End of Pod2Wiki -->
+
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
−
<!-- Pod2Wiki=item_commit -->==commit==
+
<span style='display:none'>User Comments</span>
 +
<!-- Edit below this comment -->
  
−
<!-- End of Pod2Wiki -->
 
−
<!-- Pod2Wiki=item_destroy_field -->==destroy_field==
 
  
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====validate====
  
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$problems = $metafield-&gt;validate( $repository )
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Returns any problems associated with this metafield as an array  reference.
  
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====render_citation====
  
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$xhtml = $metafield-&gt;render_citation( [ $type, %params ] )
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Returns a XHTML DOM rendering of the metafield using citation  <tt>$type</tt> (of <tt>default</tt> if not provided) an specified <tt>%params</tt>.
  
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==SEE ALSO==
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[[API:EPrints/DataObj|EPrints::DataObj]] and [[API:EPrints/DataSet|EPrints::DataSet]].
  
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==COPYRIGHT==
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{{API:Copyright}}
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<!-- Pod2Wiki=item_validate -->==validate==
 
  
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<!-- Pod2Wiki=_postamble_ --><!-- Edit below this comment -->

Latest revision as of 17:12, 10 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::MetaField - metadata fields

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DESCRIPTION

This is an internal class that should not be used outside EPrints::Database.

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CORE METADATA FIELDS

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metafieldid (counter)

The unique identifer for the metafield.

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mfdatasetid (set)

The dataset two which this metafield belongs.

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name (text)

The name of this metafield.

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type (set)

The type of this metafield.

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provenance (set)

The provenance of this metafield.

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phrase_name (multilang, multiple)

The phrase name(s)(labels) potentially in multiple languages for this metafield.

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phrase_help (multilang, multiple)

The phrase help text(s) potentially in multiple languages for this metafield.

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required (boolean)

Whether this metafield is required for the dataset.

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multiple (boolean)

Whether this metafield can have multiple values for a data object.

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allow_null (boolean)

Whether this metafield can have a null value.

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export_as_xml (boolean)

Whether this metafield can be exported in XML.

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volatile (boolean)

Whether this metafield stores a volatile data.

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min_resolution (set)

The minimum time resolution (second, minute, hour, day, month or year) for this metafield if it is a timestamp/datestamp.

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sql_index (boolean)

Whether an SQL index should be created for this metafield.

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render_input (text)

A different or bespoke function to render the input field for this metafield.

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render_value (text)

A different or bespoke function to render the value for this metafield.

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input_ordered (boolean)

Whether the input for this metafield is ordered.

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maxlength (int)

The maximum length for this metafield if it is a text or subclass of a text field.

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browse_link (boolean)

The link to a browse view for this metafield if it is a subject metafield.

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top (text)

The top subject in the subject tree that should be used as options for this subject metafield.

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datasetid (text)

The dataset ID for this metafield, if it is a search, subobject, dataobjref, fields, itemref or file field.

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set_name (text)

The name of the file that contains the options for this namedset metafield.

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options (text)

The commas separated list of options for this set metafield.

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render_order (set)

The order to render a name if this metafield is for a name.

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hide_honourific (boolean)

Whether to hide the honourfic sub-field if this is a name metafield.

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hide_lineage (boolean)

Whether to hide the lineage sub-field if this is a name metafield.

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family_first (boolean)

Whether to render the family name sub-field before the given name if this is a name metafield.

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input_style (set)

A particular style for displaying the input form element for this metafield.

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input_rows (int)

The number of input rows for this metafield.

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input_cols (int)

The number of input columns for this metafield.

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input_boxes (int)

The number of input boxes for this metafield.

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sql_counter (text)

The name to give to the sql counter for this counter metafield. Typically the same as the metafield's name.

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default_value (text)

The default value for this metafield.

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REFERENCES AND RELATED OBJECTS

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parent (itemref)

The parent metafield this metafield belongs to, if it is a sub-field.

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fields (subobject, multiple)

Sub-fields of this metafield.

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INSTANCE VARIABLES

See EPrints::DataObj.

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METHODS

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Utility Methods

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dataset_ids

@ids = EPrints::DataObj::MetaField::dataset_ids( $repo )

Returns array of all dataset IDs for non-virtual datasets in $repo.

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render_dataset_id

$dataset_label = EPrints::DataObj::MetaField::render_dataset_id( $repo, $id )

Returns XHTML DOM rendering of phrase for dataset with $id.

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options_fromform

$options = EPrints::DataObj::MetaField::options_fromform( $value )

Returns an array reference of options from the comma-separated $value provided.

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options_toform

$options_str = EPrints::DataObj::MetaField::options_toform( $value )

Returns a comma-separated string of options from the array reference $value provided.

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boolean_fromform

$boolean = EPrints::DataObj::MetaField::boolean_fromform( $value )

Returns true or false, (literally 1 or 0) depending on the $value representation of a boolean in a form.

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boolean_toform

$boolean_str = EPrints::DataObj::MetaField::boolean_toform( $value )

Returns a string representation of a boolean ("TRUE", "FALSE" or undef) depending on the to form $value provided.

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Constructor Methods

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new_from_field

$metafield = EPrints::DataObj::MetaField->new_from_field( $repo, $field, [ $dataset ] )

Returns a new metafield data object based on $field.

$dataset is determined from dataset ID of class (i.e. metafield) if unset.

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Class Methods

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get_system_field_info

$thing = EPrints::DataObj::MetaField->get_system_field_info

Returns an array describing the system metadata fields of the metafield dataset.

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get_dataset_id

$dataset = EPrints::DataObj::MetaField->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 = EPrints::DataObj::MetaField->get_parent_dataset_id

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

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get_defaults

$defaults = EPrints::DataObj::MetaField->get_defaults( $repo, $data, [ $dataset ] )

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

Get $dataset from class if not defined.

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Object Methods

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get_property_defaults

$defaults = $metafield->get_property_defaults( $repo, $type )

Gets the property defaults for metafield $type.

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dump

$str = $metafield->dump

Dump the fields configuration as used in cfg.d.

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get_parent_id

$parent = $metafield->get_parent_id

Returns the parent ID for this metafield.

Alias for: 

$metafield->value( "parent" );

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remove

$ok = $metafield->remove

Remove the field and any sub-fields from the database.

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config_path

$path = $metafield->config_path

Returns the root directory of the repository configuration path.

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config_filename

$filename = $metafield->config_filename( $dataset )

Returns the location of the cfg.d config file for the provided $dataset.

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phrases_filename

$filename = $metafield->phrases_filename( $langid )

Returns the location of the XML phrases file for provided $lang.

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workflow_filename

$filename = $metafield->workflow_filename( $dataset )

Returns the location of the workflow file for the provided $dataset.

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add_to_phrases

$ok = $metafield->add_to_phrases

Adds the phrases defined by this metafield to the system.

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remove_from_dataset

$ok = $metafield->remove_from_dataset

Remove this metafield from the dataset specified by its mfdatasetid value.

Returns boolean dependent on success removing from the dataset.

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add_to_database

$ok = $metafield->add_to_database

Add this metafield to the database.

Returns boolean dependent on success adding to the database.

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remove_from_database

$ok = $metafield->remove_from_database

Remove this field from the database.

Returns boolean dependent on success removing from the database.

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add_to_workflow

$ok = $metafield->add_to_workflow

Add this metafield to the workflow in the Misc. section.

Returns boolean dependent on success adding to the workflow.

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remove_from_workflow

$ok = $metafield->remove_from_workflow

Remove all occurrences of this field from the workflow. Will remove the local stage if it is empty.

Returns boolean dependent on success removing from the workflow.

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perl_struct

$data = $metafield->perl_struct( $prefix )

Returns the Perl data structure representation of this field, as you would find defined in the configuration or EPrints::DataObj classes.

If $prefix is defined returns the Perl data structure for the fields property, where $prefix is the fieldname of the parent field.

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make_field_object

$field = $metafield->make_field_object

Makes and returns a new field object based on this metafield.

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add_to_repository

$ok = $metafield->add_to_repository

Adds this field to the repository.

Returns boolean dependent on success adding to the repository.

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remove_from_repository

$ok = $mf->remove_from_repository

Remove this field from the repository.

Returns boolean dependent on success removing from the repository.

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validate

$problems = $metafield->validate( $repository )

Returns any problems associated with this metafield as an array reference.

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render_citation

$xhtml = $metafield->render_citation( [ $type, %params ] )

Returns a XHTML DOM rendering of the metafield using citation $type (of default if not provided) an specified %params.

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SEE ALSO

EPrints::DataObj and EPrints::DataSet.

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COPYRIGHT

© Copyright 2000-2024 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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