Class: ActiveFedora::RdfDatastreamAttribute

Inherits:
StreamAttribute show all
Defined in:
lib/active_fedora/attributes/rdf_datastream_attribute.rb

Overview

Class for attributes that are delegated to a RDFDatastream

Instance Attribute Summary

Attributes inherited from StreamAttribute

#at, #delegate_target, #target_class

Attributes inherited from DelegatedAttribute

#field, #multiple

Instance Method Summary collapse

Methods inherited from StreamAttribute

#initialize, #primary_solr_name, #type

Methods inherited from DelegatedAttribute

#initialize

Constructor Details

This class inherits a constructor from ActiveFedora::StreamAttribute

Instance Method Details

#reader(obj) ⇒ Object

Parameters:



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# File 'lib/active_fedora/attributes/rdf_datastream_attribute.rb', line 27

def reader(obj)
  node = file_for_attribute(obj, delegate_target)
  term = if at
    vals = at.dup
    while vals.length > 1
      node = node.send(vals.shift)
      node = if node.empty?
        node.build
      else
        node.first
      end
    end
    vals.first
  else
    field
  end
  node.send(term)
end

#writer(obj, v) ⇒ Object

Parameters:

  • obj (ActiveFedora::Base) —

    the object that has the attribute

  • v (Object) —

    value to write to the attribute



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# File 'lib/active_fedora/attributes/rdf_datastream_attribute.rb', line 9

def writer(obj, v)
  node = file_for_attribute(obj, delegate_target)
  obj.mark_as_changed(field) if obj.value_has_changed?(field, v)
  term = if at
    vals = at.dup
    while vals.length > 1
      node = node.send(vals.shift)
      node = node.build if node.empty?
      node = node.first
    end
    vals.first
  else
    field
  end
  node.send("#{term}=", v)
end