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.
When you've got an AR Model and you override the `as_json` method,
you should be able to add default options to the renderer, like this:
class User < ActiveRecord::Base
def as_json(options = {})
super(options.merge(:except => [:password_digest]))
end
end
This was not possible before this commit. See the added test case.
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.
