diff options
Diffstat (limited to 'activerecord/lib/active_record/attribute_methods/serialization.rb')
| -rw-r--r-- | activerecord/lib/active_record/attribute_methods/serialization.rb | 29 |
1 files changed, 13 insertions, 16 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/serialization.rb b/activerecord/lib/active_record/attribute_methods/serialization.rb index 264ce2bdfa..65978aea2a 100644 --- a/activerecord/lib/active_record/attribute_methods/serialization.rb +++ b/activerecord/lib/active_record/attribute_methods/serialization.rb @@ -8,11 +8,20 @@ module ActiveRecord # object, and retrieved as the same object, then specify the name of that # attribute using this method and it will be handled automatically. The # serialization is done through YAML. If +class_name+ is specified, the - # serialized object must be of that class on retrieval or - # <tt>SerializationTypeMismatch</tt> will be raised. + # serialized object must be of that class on assignment and retrieval. + # Otherwise SerializationTypeMismatch will be raised. # - # A notable side effect of serialized attributes is that the model will - # be updated on every save, even if it is not dirty. + # Empty objects as <tt>{}</tt>, in the case of +Hash+, or <tt>[]</tt>, in the case of + # +Array+, will always be persisted as null. + # + # Keep in mind that database adapters handle certain serialization tasks + # for you. For instance: +json+ and +jsonb+ types in PostgreSQL will be + # converted between JSON object/array syntax and Ruby +Hash+ or +Array+ + # objects transparently. There is no need to use #serialize in this + # case. + # + # For more complex cases, such as conversion to or from your application + # domain objects, consider using the ActiveRecord::Attributes API. # # ==== Parameters # @@ -52,18 +61,6 @@ module ActiveRecord Type::Serialized.new(type, coder) end end - - def serialized_attributes - ActiveSupport::Deprecation.warn(<<-WARNING.strip_heredoc) - `serialized_attributes` is deprecated without replacement, and will - be removed in Rails 5.0. - WARNING - @serialized_attributes ||= Hash[ - columns.select { |t| t.cast_type.is_a?(Type::Serialized) }.map { |c| - [c.name, c.cast_type.coder] - } - ] - end end end end |