更新的 ruby​​ 和 rails 给 .new .update 方法带来了错误

Question

我最近更新了我的 ruby​​ 版本和 rails 版本。

ruby 1.9.3 to ruby 2.1.1
rails 3.2.6 to rails 4.0.0

然后安装以下新的 gems

 protected_attributes(1.0.3)
 turbolinks(2.5.3)

在运行代码时，创建和更新方法时出现以下错误。

.new, .update 方法出现参数数量错误（2 比 1） 错误。 例如。

      **wrong number of arguments (2 for 1)**
      def create
        **@gallery = Gallery.new(gallery_params)**
        respond_to do |format|
         if @gallery.save
          format.html { redirect_to :back, :notice => t('notice.gallery_created') }
          format.json { render json: @gallery, status: :created, location: @gallery }
         else
          format.html { render action: "new" }
          format.json { render json: @gallery.errors, status: :unprocessable_entity }
         end
       end
    end

      private
      def gallery_params
            params.require(:gallery).permit(:title, :user_id, :description, images_attributes: [:title, :description, :image, :user_id])
      end

我正在从我的表单中发送以下参数。

  Parameters: {"utf8"=>"✓", "authenticity_token"=>"4DosQk69bQzV9idZapxjseVPNedORytYtNYH4rUCeBk=", "gallery"=>{"title"=>"test title 10", "description"=>"this is the gallery desription", "user_id"=>"1", "images_attributes"=>{"0"=>{"title"=>"test image", "description"=>"", "image"=>#<ActionDispatch::Http::UploadedFile:0xb48788b8 @tempfile=#<Tempfile:/tmp/RackMultipart20160229-7649-3kw561>, @original_filename="564650_685411374823853_181629729_n.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"gallery[images_attributes][0][image]\"; filename=\"564650_685411374823853_181629729_n.jpg\"\r\nContent-Type: image/jpeg\r\n">, "user_id"=>"1"}}}, "commit"=>"Update", "locale"=>"en"}

我的应用程序中的每个 表单（form_for 或 nested_form_for）都会出错。

在控制器中尝试了以下代码来保存我的数据，但 .new .update 仍然存在问题。 例如。

@gallery = Gallery.new
@gallery.title = "test title 10"
@gallery.description = "this is the gallery description"
@gallery.user_id =  1
@gallery.save   

Answer 1

试试这个：

def gallery_params
  params.require(:gallery).permit(:title, :user_id, :description, images_attributes: [:title, :description, :image, :user_id])
end

Answer 2

一旦这样尝试，让我们看看问题是否在强参数中

def create
        @gallery = Gallery.new({"title"=>"test title 10", "description"=>"this is the gallery desription", "user_id"=>"1", "images_attributes"=>{"0"=>{"title"=>"test image", "description"=>"", "image"=>#<ActionDispatch::Http::UploadedFile:0xb48788b8 @tempfile=#<Tempfile:/tmp/RackMultipart20160229-7649-3kw561>, @original_filename="564650_685411374823853_181629729_n.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"gallery[images_attributes][0][image]\"; filename=\"564650_685411374823853_181629729_n.jpg\"\r\nContent-Type: image/jpeg\r\n">, "user_id"=>"1"}}})
        respond_to do |format|
         if @gallery.save
          format.html { redirect_to :back, :notice => t('notice.gallery_created') }
          format.json { render json: @gallery, status: :created, location: @gallery }
         else
          format.html { render action: "new" }
          format.json { render json: @gallery.errors, status: :unprocessable_entity }
         end
       end
    end