diff options
Diffstat (limited to 'activerecord/lib/active_record/attribute_methods/before_type_cast.rb')
-rw-r--r-- | activerecord/lib/active_record/attribute_methods/before_type_cast.rb | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/before_type_cast.rb b/activerecord/lib/active_record/attribute_methods/before_type_cast.rb new file mode 100644 index 0000000000..5941f51a1a --- /dev/null +++ b/activerecord/lib/active_record/attribute_methods/before_type_cast.rb @@ -0,0 +1,78 @@ +# frozen_string_literal: true + +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 <tt>*_before_type_cast</tt> + # 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" + attribute_method_suffix "_came_from_user?" + 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].value_before_type_cast + 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.values_before_type_cast + end + + private + + # Handle *_before_type_cast for method_missing. + def attribute_before_type_cast(attribute_name) + read_attribute_before_type_cast(attribute_name) + end + + def attribute_came_from_user?(attribute_name) + @attributes[attribute_name].came_from_user? + end + end + end +end |