Module: CassandraObject::NestedAttributes::ClassMethods

Defined in:
lib/cassandra_object/nested_attributes.rb

Constant Summary collapse

REJECT_ALL_BLANK_PROC = 
proc { |attributes| attributes.all? { |_, value| value.blank? } }

Instance Method Summary collapse

Instance Method Details

#accepts_nested_attributes_for(*attr_names) ⇒ Object 



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# File 'lib/cassandra_object/nested_attributes.rb', line 21

def accepts_nested_attributes_for(*attr_names)
  options = { :allow_destroy => false, :update_only => false }
  options.update(attr_names.extract_options!)
  options.assert_valid_keys(:allow_destroy, :reject_if, :limit, :update_only)
  options[:reject_if] = REJECT_ALL_BLANK_PROC if options[:reject_if] == :all_blank

  attr_names.each do |association_name|
    if reflection = reflect_on_association(association_name)
      reflection.options[:autosave] = true
      add_autosave_association_callbacks(reflection)
      nested_attributes_options[association_name.to_sym] = options
      type = (reflection.collection? ? :collection : :one_to_one)

      # def pirate_attributes=(attributes)
      #   assign_nested_attributes_for_one_to_one_association(:pirate, attributes)
      # end
      class_eval <<-eoruby, __FILE__, __LINE__ + 1
        if method_defined?(:#{association_name}_attributes=)
          remove_method(:#{association_name}_attributes=)
        end
        def #{association_name}_attributes=(attributes)
          assign_nested_attributes_for_#{type}_association(:#{association_name}, attributes)
        end
      eoruby
    else
      raise ArgumentError, "No association found for name `#{association_name}'. Has it been defined yet?"
    end
  end
end