使用postman来POST一些要在DB中创建的JSON,有一个代码片段供你测试.获取一个错误,指出方法'movie'未定义,但该方法永远不会被调用.

{"movie": {
     "title": "Its a Mad Mad Word",
     "year": "1967",
     "summary": "So many big stars"
     }
 }

下面是代码,错误如下:

undefined method 'movie' for #<Movie:0x007fcfbd99acc0>

应用控制器

class ApplicationController < ActionController::Base
  protect_from_forgery with: :null_session
end

调节器

module API 
    class MoviesController < ApplicationController
...
        def create
            movie = Movie.new({
                title: movie_params[:title].to_s,
                year: movie_params[:year].to_i,
                summary: movie_params[:summary].to_s
            })
            if movie.save
                render json: mov, status: 201
            else
                render json: mov.errors, status: 422
            end

        end

        private 
        def movie_params
            params.require(:movie).permit(:title, :year, :summary)
        end
    end
end

模型

class Movie …