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我有一个简单的推荐表格。推荐 has_many 资产。

所以在我的控制器中，我正在做一个简单的事情：

 6.times {@recommendation.assets.build}

当我尝试保存推荐并且存在验证错误时，会出现我的问题。我的创建操作：

def create
    @recommendation = Recommendation.new(params[:recommendation])
    @recommendation.user_id = current_user.id
    respond_to do |format|
      if @recommendation.save
        format.html { redirect_to thankyou_path, notice: 'Recommendation was successfully created.' }
      else
        6.times {@recommendation.assets.build} if @recommendation.assets.blank?
        render action: "new"

      end
    end
  end

运行此页面并提交（带有验证错误）会导致以下日志输出和 http 406 错误

Started POST "/categories/1/awards/9/recommendations" for 127.0.0.1 at 2013-01-07 11:50:13 -0800
  Processing by RecommendationsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"8PVfFZGa72+3KU/km2weZhNy0rxRfp0Qd+CkHdBoQM8=", "recommendation"=>{"nominee"=>"", "title"=>"", "department"=>"", "award_id"=>"9", "summary"=>"", "accomplishments"=>"", "caption"=>"", "url"=>"", "supervisor"=>"You ARE NOT the nominee’s direct manager / supervisor", "approvals_attributes"=>{"0"=>{"email"=>""}}}, "commit"=>"Save/Submit", "category_id"=>"1", "award_id"=>"9"}
  User Load (0.3ms)  SELECT "users".* FROM "users" WHERE "users"."id" = 2 LIMIT 1
   (0.2ms)  BEGIN
   (0.1ms)  ROLLBACK
Rendered shared/_recommend_timeline.html.erb (1.2ms)
  Award Load (20.1ms)  SELECT "awards".* FROM "awards" WHERE "awards"."id" = 9 LIMIT 1
Rendered recommendations/_form.html.erb (66.7ms)
Rendered recommendations/new.html.erb within layouts/application (69.8ms)
   (0.5ms)  SELECT COUNT(*) FROM "recommendations" WHERE "recommendations"."user_id" = 2
   (0.6ms)  SELECT COUNT(*) FROM "approvals" WHERE "approvals"."email" = 'tj@ravennainteractive.com' AND "approvals"."approved" IS NULL
Completed 406 Not Acceptable in 556ms (Views: 188.6ms | ActiveRecord: 31.5ms)

我查看了堆栈上的多个问题，这些问题看起来相似但

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1 回答 1

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我不确定是否有足够的信息可以很有信心地回答，但我认为您不想准确地重建 6 次。根据您的模型设置，验证可能会取消一个，但不是所有的关联。

也许你应该尝试：

(6-@recommendation.assets.count).times {@recommendation.assets.build}

我的猜测是，您的视图期望正好有 6 个资产，但在抛出无效资产后只能找到 1-5 个，这会导致内部错误。

如果这不能解决问题，我认为您可能需要提供更多关于资产上正在运行哪些验证以及您的视图是什么样子的信息。

于 2013-01-08T00:03:34.433 回答