Ruby-on-rails 更改 Rails 路由中的 id 参数
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Changing the id parameter in Rails routing
提问by joeellis
Using Ruby on Rails 3's new routing system, is it possible to change the default :id parameter
使用 Ruby on Rails 3 的新路由系统，是否可以更改默认的 :id 参数
resources :users, :key => :username
come out with the following routes
出来的路线如下
/users/new
/users/:username
/users/:username/edit
...etc
I'm asking because although the above example is simple, it would be really helpful to do in a current project I'm working on.
我问是因为虽然上面的例子很简单，但在我正在从事的当前项目中做真的很有帮助。
Is it possible to change this parameter, and if not, is there a particular reason as to why not?
是否可以更改此参数，如果不能，是否有特殊原因？
采纳答案by Ju Nogueira
回答by Ujjwal Thaakar
In your route you can use
在您的路线中，您可以使用
resources :user, param: :username
回答by Matt
For Ruby on Rails 4.1.4 (and possibly earlier versions) you need to do what bothj..and Ujjwalsuggested:
对于Ruby on Rails的4.1.4（甚至更早的版本），你需要做什么都Ĵ..和Ujjwal建议：
1) In config/routes.rb, add:
1) 在 中config/routes.rb，添加：
resources :user, param: :username
2) In app/models/user.rb, add:
2) 在 中app/models/user.rb，添加：
def to_param
username
end
In you only do #1 then all your routes will be correct, as can be seen from rake routes:
如果你只做 #1，那么你的所有路线都是正确的，从rake routes以下可以看出：
$ rake routes
Prefix Verb URI Pattern Controller#Action
user_index GET /user(.:format) user#index
POST /user(.:format) user#create
new_user GET /user/new(.:format) user#new
edit_user GET /user/:username/edit(.:format) user#edit
user GET /user/:username(.:format) user#show
PATCH /user/:username(.:format) user#update
PUT /user/:username(.:format) user#update
DELETE /user/:username(.:format) user#destroy
However the helper methods that construct a url based on a Userinstance will still include the idin the url, e.g. /user/1. To get the usernamein the constructed urls, you need to override to_paramas in #2.
然而，基于User实例构造 url 的辅助方法仍将包含id在 url 中，例如/user/1. 要username在构造的 url 中获取 ，您需要to_param像 #2 一样覆盖。
回答by Trav McKinney
The FriendlyIdgem can help you out with this. Ryan Bates has a good video tutorialon using this gem.
该FriendlyId宝石可以帮你出这一点。Ryan Bates 有一个关于使用这个 gem的很好的视频教程。
回答by KULKING
Although the answer has been accepted by the asker, but there is a simple approach to do this. Write this code in your controller.
虽然答案已被提问者接受，但有一个简单的方法可以做到这一点。在您的控制器中编写此代码。
authorize_resource :find_by => :username
and in your view, where you want to show the link, write this code.
并在您想要显示链接的位置编写此代码。
<%= link_to "Username", user_path(u.username) %>
You don't need any other changes in your routes or controller.
您不需要对路由或控制器进行任何其他更改。
UPDATE:This will only work if you are using CanCan gem.
更新：这仅在您使用 CanCan gem 时才有效。
回答by Harish Shetty
Pass the user name as the input to the path helpers.
将用户名作为输入传递给路径助手。
In your view code:
在您的视图代码中：
user_path(u.username) #/users/john
In your controller treat the idreceived as username:
在您的控制器中，将id收到的视为username：
def show
user = User.find_by_username!(params[:id])
...
end
