我找到了解决方案.它不能自动执行，但是您可以使用以下命令对嵌套对象强制执行序列化程序:

I found a solution. It cannot be performed automatically but you can force a serializer on a nested object by using:

render json: {user_type: "student", student: StudentSerializer.new(stu)}

一个有趣的注释是，提起请求已提交，并且对于active_model_serializers https://github.com /rails-api/active_model_serializers/pull/300 会自动执行此任务.

An interesting note is that a pull request was submitted and remains in limbo for active_model_serializers https://github.com/rails-api/active_model_serializers/pull/300 which would preform this task automatically.