ruby-on-rails - Rails 4.1 ActionController::UnknownFormat 错误响应使用 AngularJS

Question

尝试在 rails Controller 中使用 respond_to 和 respond_with 时，不断收到 ActionController:UnknownFormat 错误。 Controller 中的以下行出错。

respond_with @surveys 

在/app/assets/controllers/surveys_controller

respond_to :json

def index
  @surveys = Survey.all
  respond_with @surveys
end

在/config/routes.rb

WebInsight::Application.routes.draw do

   scope :api do
      resources :surveys, defaults: {format: 'json'}
   end

   resources :surveys
end

在/app/assets/views/surveys/index.html.erb

<h1>Your Surveys</h1>

<form>
  <input type="text" ng-model='newSurvey' placeholder="Enter a survey">
  <input type="submit" value="Add">
</form>

<div ng-controller="SurveysCtrl">
    <ul>
        <li ng-repeat="survey in surveys">
          {{ survey.theme_id }}, {{ survey.name }}, {{ survey.description }}
        </li>
    </ul>
</div>

在/app/assets/javascripts/angular/controllers/surveys_ctrl.js

app.controller('SurveysCtrl', ['$scope', '$resource', function($scope, $resource) {
   var Surveys = $resource('/api/surveys');
   $scope.surveys = Surveys.query();
}]);

Answer 1

它接缝有

respond_to :json

当路由将 json 定义为默认值时有效

scope :api, defaults: {format: :json} do
  resources :resources
end

不允许 Controller 中的 html 只需将以下内容添加到方法中

def new
  @resource = Resource.new
  respond_with(@resource) do |format|
    format.html { render nothing: true, status: :unauthorized }
    format.json { render :json => @resource.as_json }
  end
end