未定义的方法`upcase'用于＃<task：0x007f91f6442390>

Question

当我从我的js文件发送帖子请求时

$http.post('/users/:user_id/tasks/', {id: $scope.task.id, title: data});

到我的控制器中的创建操作，我收到以下错误。

带参数

这是什么意思？

控制器

  def create
    respond_to current_user.tasks.create(task_params)
  end

  private

  def task_params
    params.require(:task).permit(:id, :title, :due_date, :priority, :complete)
  end

佣金路线

         user_tasks GET    /users/:user_id/tasks(.:format)          tasks#index
                    POST   /users/:user_id/tasks(.:format)          tasks#create
      new_user_task GET    /users/:user_id/tasks/new(.:format)      tasks#new
     edit_user_task GET    /users/:user_id/tasks/:id/edit(.:format) tasks#edit
          user_task GET    /users/:user_id/tasks/:id(.:format)      tasks#show
                    PATCH  /users/:user_id/tasks/:id(.:format)      tasks#update
                    PUT    /users/:user_id/tasks/:id(.:format)      tasks#update
                    DELETE /users/:user_id/tasks/:id(.:format)      tasks#destroy

rails console log

Started POST "/users/:user_id/tasks/" for 127.0.0.1 at 2015-08-24 15:46:23 +0300
Processing by TasksController#create as HTML
  Parameters: {"id"=>1, "title"=>"some text", "user_id"=>":user_id", "task"=>{"id"=>1, "title"=>"some text"}}
  User Load (0.4ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
   (0.2ms)  begin transaction
   (0.1ms)  commit transaction
Completed 500 Internal Server Error in 11ms (ActiveRecord: 0.8ms)

NoMethodError (undefined method `upcase' for #<Task:0x007f91f513a4c8>):
  app/controllers/tasks_controller.rb:22:in `create'


  Rendered /home/alex/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_source.erb (9.9ms)
  Rendered /home/alex/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (4.4ms)
  Rendered /home/alex/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.6ms)
  Rendered /home/alex/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout (39.4ms)
Cannot render console with content type application/jsonAllowed content types: [#<Mime::Type:0x00000003c77a60 @synonyms=["application/xhtml+xml"], @symbol=:html, @string="text/html">, #<Mime::Type:0x00000003c57cb0 @synonyms=[], @symbol=:text, @string="text/plain">, #<Mime::Type:0x00000003c4b960 @synonyms=[], @symbol=:url_encoded_form, @string="application/x-www-form-urlencoded">]

Answer 1

我还没有在

之前看到过这种语法

def create
  respond_to current_user.tasks.create(task_params)
end

通常会像

一样

def create
  if current_user.tasks.create(task_params)
    @created = true
  end
  respond_to do |format|
    format.html #will do default which is render :action => "create"
  end
end

我认为这可能是你的问题：respond_to正在传递一个它没有预料到的Task对象，我想在它传递的内容上调用upcase是其中的一部分＆＃39 ; s正常行为。

修改 它可能意味着respond_with而不是respond_to吗？

$ne