module ActiveRecord module AttributeMethods # = Active Record Attribute Methods Before Type Cast # # ActiveRecord::AttributeMethods::BeforeTypeCast provides a way to # read the value of the attributes before typecasting and deserialization. # # class Task < ActiveRecord::Base # end # # task = Task.new(id: '1', completed_on: '2012-10-21') # task.id # => 1 # task.completed_on # => Sun, 21 Oct 2012 # # task.attributes_before_type_cast # # => {"id"=>"1", "completed_on"=>"2012-10-21", ... } # task.read_attribute_before_type_cast('id') # => "1" # task.read_attribute_before_type_cast('completed_on') # => "2012-10-21" # # In addition to #read_attribute_before_type_cast and #attributes_before_type_cast, # it declares a method for all attributes with the *_before_type_cast # suffix. # # task.id_before_type_cast # => "1" # task.completed_on_before_type_cast # => "2012-10-21" module BeforeTypeCast extend ActiveSupport::Concern included do attribute_method_suffix "_before_type_cast" end # Returns the value of the attribute identified by +attr_name+ before # typecasting and deserialization. # # class Task < ActiveRecord::Base # end # # task = Task.new(id: '1', completed_on: '2012-10-21') # task.read_attribute('id') # => 1 # task.read_attribute_before_type_cast('id') # => '1' # task.read_attribute('completed_on') # => Sun, 21 Oct 2012 # task.read_attribute_before_type_cast('completed_on') # => "2012-10-21" # task.read_attribute_before_type_cast(:completed_on) # => "2012-10-21" def read_attribute_before_type_cast(attr_name) @attributes[attr_name.to_s] end # Returns a hash of attributes before typecasting and deserialization. # # class Task < ActiveRecord::Base # end # # task = Task.new(title: nil, is_done: true, completed_on: '2012-10-21') # task.attributes # # => {"id"=>nil, "title"=>nil, "is_done"=>true, "completed_on"=>Sun, 21 Oct 2012, "created_at"=>nil, "updated_at"=>nil} # task.attributes_before_type_cast # # => {"id"=>nil, "title"=>nil, "is_done"=>true, "completed_on"=>"2012-10-21", "created_at"=>nil, "updated_at"=>nil} def attributes_before_type_cast @attributes end private # Handle *_before_type_cast for method_missing. def attribute_before_type_cast(attribute_name) read_attribute_before_type_cast(attribute_name) end end end end