无法验证CSRF令牌的真实性！带POST的RAILS API

Question

我尝试使用Rails API发布json文件。 我试着修复但无法运行 这是我的问题：

服务器日志：

Started POST "/students/" for 127.0.0.1 at 2016-09-17 17:45:33 +0700
  ActiveRecord::SchemaMigration Load (0.0ms)  SELECT "schema_migrations".* FROM "schema_migrations"
Processing by Devise::RegistrationsController#create as */*
  Parameters: {"student"=>{"name"=>"Duong", "score"=>"10"}, "registration"=>{"student"=>{"name"=>"Duong", "score"=>"10"}}}
Can't verify CSRF token authenticity.
Unpermitted parameters: name, score
   (0.0ms)  begin transaction
   (0.0ms)  rollback transaction
  Rendering C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/devise-4.2.0/app/views/devise/registrations/new.html.erb within layouts/application
  Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/devise-4.2.0/app/views/devise/shared/_links.html.erb (10.0ms)
  Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/devise-4.2.0/app/views/devise/registrations/new.html.erb within layouts/application (60.0ms)
Completed 500 Internal Server Error in 442ms (ActiveRecord: 0.0ms)

Student.rb

这是我的学生模特

class Student < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable
end

Application_controller

我已修复excetion =＆gt; null_session

class ApplicationController < ActionController::Base

  protect_from_forgery with: :null_session

end

Student_controller

class Api::StudentsController < ApplicationController
  def index
    students = Student.all
    render json: students, status: 200
  end
  def show
    response_with Student.find(params[:id])
  end
  def create
    student = Student.new(student_params)
    #if you save successfully than response with json data and status code 201
    if student.save
      render json: user, status: 201, location: student
    else
      render json: {error: user.errors}, status: 422
    end
  end
  private
  def student_params
    params.require(:student).permit(:name, :score)
  end
end

router.rb

Rails.application.routes.draw do
  devise_for :students
  namespace :api, path: '/',constraints: {subdomain: 'api'} do
    resources :students, only: [:index, :show, :create]
  end
end

但是，当我发送帖子给api.1312100.com/students /

时

{"student": {"name": "Duong", "score": "10"}}

有错误：

500 internal server error

Answer 1

在Api::StudentsController添加：

skip_before_action :verify_authenticity_token

Answer 2

<强>卷曲：

class ApplicationController < ActionController::Base
    protect_from_forgery with: :exception, if: Proc.new { |c| c.request.format != 'application/json' }
    protect_from_forgery with: :null_session, if: Proc.new { |c| c.request.format == 'application/json' }
end

应用程序控制器

ubuntu 14.04