The following constants were renamed:
ActiveModel::Serialization => ActiveModel::Serializable
ActiveModel::Serializers::JSON => ActiveModel::Serializable::JSON
ActiveModel::Serializers::Xml => ActiveModel::Serializable::XML
The main motivation for such a change is that `ActiveModel::Serializers::JSON`
was not actually a serializer, but a module that when included allows the target to be serializable to JSON.
With such changes, we were able to clean up the namespace to add true serializers as the ArraySerializer.
Previously, it would use send() to get the attribute. In Active
Resource, this would rely on hitting method missing. If a method with
the same name was defined further up the ancestor chain, that method
would wrongly be called.
This change fixes test_to_xml_with_private_method_name_as_attribute in
activeresource/test/cases/base_test.rb, which was broken after
51bef9d8fb0b4da7a104425ab8545e9331387743, because that change made
to_xml use serializable_hash.
This commit moves support for the :include serialization option for
serializing associated objects out of ActiveRecord in into ActiveModel.
The following methods support the :include option:
* serializable_hash
* to_json
* to_xml
Instances must respond to methods named by the values of the :includes
array (or keys of the :includes hash). If an association method returns
an object that is_a?(Enumerable) (which AR has_many associations do), it
is assumed to be a collection association, and its elements must respond
to :serializable_hash. Otherwise it must respond to :serializable_hash
itself.
While here, fix#858, XmlSerializer should not singularize already
singular association names.
