如何解决 ActiveModel::Serializer::Null::with Hash 的这个问题答案

【问题标题】：How do I solve this issue of ActiveModel::Serializer::Null::with Hash如何解决 ActiveModel::Serializer::Null::with Hash 的这个问题
【发布时间】：2017-12-29 17:21:47
【问题描述】：

我正在尝试使用 API 注册学生。我正在使用邮递员进行测试。这是我尝试发布新学生时的日志

Started POST "/api/v1/students/" for 127.0.0.1 at 2017-12-29 12:11:12 -0500
Processing by Api::V1::StudentsController#create as */*
[active_model_serializers] Rendered ActiveModel::Serializer::Null with Hash 
(0.12ms)
Filter chain halted as :authenticate_user! rendered or redirected
Completed 401 Unauthorized in 3ms (Views: 1.1ms | ActiveRecord: 0.0ms)

Started POST "/api/v1/students/" for 127.0.0.1 at 2017-12-29 12:14:07 -0500
Processing by Api::V1::StudentsController#create as */*
[active_model_serializers] Rendered ActiveModel::Serializer::Null with Hash 
(0.19ms)
Filter chain halted as :authenticate_user! rendered or redirected
Completed 401 Unauthorized in 106ms (Views: 103.7ms | ActiveRecord: 0.0ms)

这是我的控制器：

class Api::V1::StudentsController < Api::V1::BaseController

    def create
        student = Student.new(student_params)

        if student.save
            render json: {status: 'SUCCESS', message: 'Registered', data: student_data}, status: :ok
        else
            render json: {status: 'ERROR', message: 'Student not registered', data: student.errors}, status: :unprocessable_entity
        end 
    end

end

【问题讨论】：

标签： ruby-on-rails json api

【解决方案1】：

修改这个

基础控制器：-

before_action :authenticate_user!, except: [:new]

【讨论】：