Module: Positionable::Extension::ClassMethods

Defined in:
lib/activerecord-positionable/extension.rb

Instance Method Summary collapse

Instance Method Details

#position_attr(*attr_names) ⇒ Object 



28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# File 'lib/activerecord-positionable/extension.rb', line 28

def position_attr(*attr_names)
  attr_names.each do |attr_name|
    after_save :"assign_#{attr_name}!", if: :"#{attr_name}_missing?"

    class_eval "      def \#{attr_name}_missing?\n        self[:\#{attr_name}].blank?\n      end\n\n      def assign_\#{attr_name}!\n        self[:\#{attr_name}] = id\n        save!\n      end\n    BODY\n  end\n  self.attributes_marked_as_position += attr_names\nend\n", __FILE__, __LINE__ + 1

#positionable(attr_name = :position) ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/activerecord-positionable/extension.rb', line 16

def positionable(attr_name = :position)
  position_attr(attr_name)

  scope :ordered, -> { order(Hash[attr_name, :desc]).order(id: :desc) }
  scope :latest,  -> { ordered }

  self.positionable_options = positionable_options.deep_dup.merge!(
    attribute: attr_name,
    scope: :ordered
  )
end