Html 没有路由匹配缺少必需的键：[:id]
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No route matches missing required keys: [:id]
提问by letz
I'm new at Rails and I've seem similar problems, but I can't solve mine.
我是 Rails 的新手，我似乎遇到了类似的问题，但我无法解决我的问题。
My routes:
我的路线：
resources :users do
resources :items
end
My models:
我的模型：
class Item < ActiveRecord::Base
belongs_to :user
end
class User < ActiveRecord::Base
has_many :items
end
HTML:
HTML：
<% @items.each do |item| %>
<tr>
<td><%= item.id %></td>
<td><%= item.code %></td>
<td><%= item.name %></td>
<td><%= item.quantity %></td>
<td><%= link_to "Edit", edit_user_item_path(item) %></td> <---- error
And I'm getting the same error:
我得到了同样的错误：
No route matches {:action=>"edit", :controller=>"items",
:user_id=>#<Item id: 1, user_id: 1, code: "123", name: "test",
quantity: 12, , created_at: "2014-02-11 15:45:30", updated_at:
"2014-02-11 15:45:30">, :id=>nil, :format=>nil} missing required keys: [:id]
回答by jklina
You need to include the user as well since its a nested route. So something like:
您还需要包含用户，因为它是一个嵌套路由。所以像：
<td><%= link_to "Edit", edit_user_item_path(@user, item) %></td>
回答by hainguyen
The problem is that you are using nested resources:
问题是您正在使用嵌套资源：
resources :users do
resources :items
end
So when you have a link:
所以当你有一个链接时：
<%= link_to "Edit", edit_user_item_path(item) %>
It will lack one user_idso the easy to check the issue is using rake routes. And it will list the routes like this:
它将缺少一个，user_id因此易于检查问题的方法是使用rake routes. 它会列出这样的路线：
edit_user_item GET /users/:user_id/items/:id/edit(.:format) items#edit
You can see the routes above and check it with the link, you will see it does not have user_id. That's the main reason!
您可以查看上面的路线并使用链接进行检查，您会看到它没有user_id. 这是主要原因！
回答by Zero Fiber
The object itemis being passed instead of the required id.
item正在传递对象而不是所需的 id。
<td><%= link_to "Edit", edit_user_item_path(item.id) %></td>
回答by itsnikolay
You've missed user_idin the following path:
您错过user_id了以下路径：
edit_user_item_path(user_id, item)
format you are able to find just running bundle exec rake routes | grep edit_user_item
格式你可以找到只是运行 bundle exec rake routes | grep edit_user_item
