Question

我试图创建一个＆＃34; gif＆＃34;使用form_for的对象。但是，当我点击提交时，我只是被重定向到我的＆＃34; gif＆＃34;索引页面，没有创建任何内容。我想点击＆＃34;提交＆＃34;有一个＆＃34; gif＆＃34;创建并重定向到其页面。

这是我的控制器页面

<%= form_for @gif, :as => :gif, :url => gifs_path do |f| %>
 .....
<% end %>

这是我在新页面上的表单

Started POST "/gifs" for 69.127.215.48 at 2017-01-14 21:56:18 +0000
Processing by GifsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"cPycHb5KywsTgLbHN+sZJjSbyAbGlGce4GDpqolTA5vQNCScBszU1C0wXqFF+jB5Y6OYfSSK0PTe1Qod9O1aGA==", "gif"=>{"title"=>"qwe", "link"=>"http://i.imgur.com/AYPJoxS.gif", "ingredients_attributes"=>{"1484430976428"=>{"name"=>"123", "_destroy"=>"false"}}, "directions_attributes"=>{"1484430978979"=>{"step"=>"123", "_destroy"=>"false"}}}, "commit"=>"Upload"}
   (0.2ms)  begin transaction
   (0.1ms)  rollback transaction
Redirected to https://recipes-in-a-gif-dleggio1.c9users.io/gifs
Completed 302 Found in 196ms (ActiveRecord: 0.3ms)


Started GET "/gifs" for 69.127.215.48 at 2017-01-14 21:56:18 +0000
Processing by GifsController#index as HTML
  Rendering gifs/index.html.erb within layouts/application
  Gif Load (0.3ms)  SELECT "gifs".* FROM "gifs"
  Tag Load (0.1ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."gif_id" = ?  [["gif_id", 1]]
  Tag Load (0.1ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."gif_id" = ?  [["gif_id", 2]]
  Tag Load (0.1ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."gif_id" = ?  [["gif_id", 3]]
  Tag Load (0.1ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."gif_id" = ?  [["gif_id", 4]]
  Tag Load (0.1ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."gif_id" = ?  [["gif_id", 5]]
  Rendered gifs/index.html.erb within layouts/application (11.2ms)
Completed 200 OK in 73ms (Views: 70.6ms | ActiveRecord: 0.8ms)

终端输出：

{{1}}

如果我将form_for更改为：gif而不是@gif，则可以正常工作。但是，我需要使用@gif作为使用coccoon的宝石。

Answer 1

当您从表单中删除:as => :gif, :url => gifs_path时会发生什么情况：

<%= form_for @gif do |f| %>
 .....
<% end %>

值得一试，我怀疑你需要其他东西

更新：

您的控制台输出显示以下内容：

(0.2ms)  begin transaction
(0.1ms)  rollback transaction

它还显示以下参数：

"gif"=>{
  "title"=>"qwe", 
  "link"=>"http://i.imgur.com/AYPJoxS.gif", 
  "ingredients_attributes"=>{
    "1484430976428"=>{
      "name"=>"123", 
      "_destroy"=>"false"
    }
  }, 
  "directions_attributes"=>{
    "1484430978979"=>{
      "step"=>"123", 
      "_destroy"=>"false"
    }
  }
}

您的 gif_params 方法看起来很好，所以当您尝试保存gif时似乎出现了问题。为了弄清楚发生了什么，我会进入 rails c 并执行以下操作：

gif = Gif.create "title"=>"qwe", "link"=>"http://i.imgur.com/AYPJoxS.gif", "ingredients_attributes"=>{ "1484430976428"=>{ "name"=>"123", "_destroy"=>"false" }}, "directions_attributes"=>{ "1484430978979"=>{ "step"=>"123", "_destroy"=>"false" }}

上面我们将几乎完全相同的参数传递给ActiveRecord，当您运行此代码时，您希望在屏幕上看到某种错误消息。也许值得运行：puts gif.errors向下钻取。在浏览器中执行此操作时，您没有收到任何错误消息，这很奇怪。

我在我自己的一个项目中看到了类似的东西，我在那里错误地配置了Pundit。不确定这是否有帮助。

Rails form_for模型不起作用

1 个答案: