保存数据给出错误，param丢失或者数值为空

我正在尝试使用Angular和Rails将输入保存到我的数据库中。在当执行的动作，我收到了400 (Bad Request)错误控制台日志和Rails错误是如下的那一刻，保存数据给出错误，param丢失或者数值为空

Started POST "/movies.json" for 127.0.0.1 at 2015-08-24 07:57:09 +0200 
Processing by MoviesController#create as JSON 
    Parameters: {"titles"=>"Star", "movie"=>{}} 
    User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT 1 [["id", 1]] 
Completed 400 Bad Request in 12ms (ActiveRecord: 0.2ms) 

ActionController::ParameterMissing (param is missing or the value is empty: title): 
    app/controllers/movies_controller.rb:24:in `movie_params' 
    app/controllers/movies_controller.rb:8:in `create'

的routes.rb

resources :movies, only: [:create, :index, :show] do 
end

使用的search.html.haml模板，这里用户应该输入标题。

#addMovie{"ng-controller" => "addMovieCtrl"} 
    %div{"ng-click" => "addMovie()"} 
    %input{:type => "text", "ng-model" => "title"} 
    addMovie action.

我movieController.js，这是操作时，将触发对DIV用户点击在#addMovie

angular.module('addMovieseat', ['ui.router', 'templates']) 

    .controller('addMovieCtrl', ['$scope', 'movies', 
    function($scope, movies){ 
     $scope.movies = movies.movies; 

     $scope.addMovie = function(){ 

     if(!$scope.title || $scope.title === '') { return; } 
     movies.create({ 
      titles: $scope.title, 
     }); 
     $scope.title = ''; 
     }; 
    } 
    ])

角服务，

angular.module('addMovieseat') 

    .factory('movies', ['$http', function($http){ 
    var o = { 
     movies: [] 
    }; 

    o.create = function(movie){ 
     return $http.post('/movies.json', movie).success(function(data){ 
     o.movies.push(data); 
     }); 
    }; 

    return o; 

    }])

而且movies_controller。 rb

class MoviesController < ApplicationController 

    def index 
    respond_with Movie.all 
    end 

    def create 
    respond_with Movie.create(movie_params) 
    end 

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

end

来源

2015-08-24 Peter Boomsma

尝试改变

movies.create({ 
    titles: $scope.title, 
});

到

movies.create({ 
    title: $scope.title, 
});

归根结底，你需要你的参数看起来像这样：

Parameters: {"movie"=>{"title"=>"Star"}}

来源

2015-08-24 06:19:58 thedanotto

改变'titles'到'title'确实固定的'400错误'。当我执行保存操作并查看movies.json文件时，它说'[null，null，null，null]'所以标题没有被保存吗？只需输入空白？我在哪里改变你建议的参数？ –

hmm ..打开'rail console'并键入'Movie.last'。如果你看到那里看起来正确的东西，那么它正确保存。如果您看到类似于'ActiveRecord Association []'或具有'title：nil'的电影记录的东西，那么它不能正确保存。如果正确保存，那么json输出存在问题。 – thedanotto

你说得对，标题正确保存。所以JSON输出存在问题。去看看它。谢谢。 –

保存数据给出错误，param丢失或者数值为空

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