Module: ActiveFedora::Attributes::ClassMethods

Defined in:
lib/active_fedora/attributes.rb

Instance Method Summary collapse

Instance Method Details

#defined_attributes ⇒ Object 



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# File 'lib/active_fedora/attributes.rb', line 87

def defined_attributes
  @defined_attributes ||= {}.with_indifferent_access
  return @defined_attributes unless superclass.respond_to?(:defined_attributes) and value = superclass.defined_attributes
  @defined_attributes = value.dup if @defined_attributes.empty?
  @defined_attributes
end

#defined_attributes=(val) ⇒ Object 



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# File 'lib/active_fedora/attributes.rb', line 94

def defined_attributes= val
  @defined_attributes = val
end

#find_or_create_defined_attribute(field, dsid, args) ⇒ Object 



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# File 'lib/active_fedora/attributes.rb', line 123

def find_or_create_defined_attribute(field, dsid, args)  
  self.defined_attributes[field] ||= DatastreamAttribute.new(field, dsid, datastream_class_for_name(dsid), args)
end

#has_attributes(*fields) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/active_fedora/attributes.rb', line 98

def has_attributes(*fields)
  options = fields.pop
  datastream = options.delete(:datastream).to_s
  raise ArgumentError, "You must provide a datastream to has_attributes" if datastream.blank?
  define_attribute_methods fields
  fields.each do |f|
    create_attribute_reader(f, datastream, options)
    create_attribute_setter(f, datastream, options)
  end
end

#multiple?(field) ⇒ Boolean

Reveal if the attribute is multivalued

Parameters:

  • field (Symbol) —

    the field to query

Returns:

  • (Boolean) 


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# File 'lib/active_fedora/attributes.rb', line 119

def multiple?(field)
  defined_attributes[field].multiple
end

#unique?(field) ⇒ Boolean

Reveal if the attribute has been declared unique

Parameters:

  • field (Symbol) —

    the field to query

Returns:

  • (Boolean) 


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# File 'lib/active_fedora/attributes.rb', line 112

def unique?(field)
  !multiple?(field)
end