如何使Angular和Rails交互？格式错误未知

Question

我的第一个项目中包含ngResource指令，以便能够与RESTful API进行交互。

然后我像这样设置我的工厂：

angular.module('app').factory('User', [
  '$resource', function($resource) {
    return $resource('/api/user_login/:id', { id: '@id' }, {
      update: { method: 'PUT' }
    });
  }
]);

在我的控制器中，我尝试保存用户即发送POST请求。

app.controller('loginCtrl', [
  '$scope', 'User', function($scope, User) {
    return User.save();
  }
]);

我的第二个项目的控制器如下所示。我正在尝试引用创建操作。

class UserSessionsController < UserApplicationController
  respond_to :js, only: :create

  def create
    if @counterparty
      session[:counterparty_id] = @counterparty.id
      @counterparty.update(signed_in: true)
    else
      flash.now[:error] = 'Invalid email or password'
    end

    respond_with(@counterparty, layout: false)
  end
end

结果我得到了ActionController :: UnknownFormat。

Started POST "/user_login" for 127.0.0.1 at 2016-02-18 16:04:58 +0200
Started POST "/user_login" for 127.0.0.1 at 2016-02-18 16:04:58 +0200
Processing by UserSessionsController#create as HTML
Processing by UserSessionsController#create as HTML
  Counterparty Load (0.3ms)  SELECT  `counterparties`.* FROM `counterparties`  WHERE `counterparties`.`email` IS NULL AND `counterparties`.`password` IS NULL LIMIT 1
  Counterparty Load (0.3ms)  SELECT  `counterparties`.* FROM `counterparties`  WHERE `counterparties`.`email` IS NULL AND `counterparties`.`password` IS NULL LIMIT 1
Completed 406 Not Acceptable in 1ms
Completed 406 Not Acceptable in 1ms

ActionController::UnknownFormat (ActionController::UnknownFormat):
  app/controllers/user_sessions_controller.rb:13:in `create'

我该如何解决这个问题？

Answer 1

更改     respond_to :js, only: :create 至     respond_to :json, only: :create

用户工厂正在以json格式执行请求，尽管控制器应该响应不适用于op的js（包括json），因此有必要明确设置respond_to json

Answer 2

用以下功能替换create function

    def create
      respond_to do |format|
       if @counterparty
         session[:counterparty_id] = @counterparty.id
         @counterparty.update(signed_in: true)
         format.json  { render :json => @counterparty.to_json ,status: :ok}
       else
         format.json  { render :json => 'Invalid email or password',status: :unprocessable_entity}
       end
      end
   end