ruby-on-rails - Ruby on Rails : set specific serializer for polymorphic association

Question

我正在尝试覆盖多态关系的默认序列化程序。我有:

class NotificationListSerializer < ActiveModel::Serializer
  attributes :id, :title
  belongs_to :notifiable, polymorphic: true
end

如 notifiable是一个组织，该组织使用 OrganizationSerializer 进行序列化。如 notifiable是一个组，该组使用 GroupSerializer 进行序列化。这是完全有道理的，但是如何根据类指定不同的序列化程序？

例如，如果 notifiable是一个组织，我想使用 SparseOrganizationSerializer 而不是 OrganizationSerializer。我怎样才能做到这一点？

我很确定这是记录在案的，但是我很难遵循并找到任何示例。

来自 documentation :

Polymorphic Relationships

Polymorphic relationships are serialized by specifying the relationship, like any other association. For example:

class PictureSerializer < ActiveModel::Serializer
  has_one :imageable
end

You can specify the serializers by overriding serializer_for. For more context about polymorphic relationships, see the tests for each adapter.

Overriding association serializer lookup

If you want to define a specific serializer lookup for your associations, you can override the ActiveModel::Serializer.serializer_for method to return a serializer class based on defined conditions.

class MySerializer < ActiveModel::Serializer
  def self.serializer_for(model, options)
    return SparseAdminSerializer if model.class == 'Admin'
    super
  end
  # the rest of the serializer
end

Answer 1

您可以使用belongs_to :notifiable 和&block 选项来指定适合的序列化程序。