編輯表單路由 - 在更新提交運行#show方法，而不是#update

Question

我有一個應用程序與虛榮的URL，我一直在努力允許用戶更新屬性。編輯表單加載正確，但在提交表單之後，而不是運行更新方法，rails會重新路由到根目錄。也不清楚爲什麼這種情況正在發生....

# users_controller 
    def edit 
    @user = User.find(params[:id]) 
    end 

    def to_param # overridden 
    username.parameterize 
    end 

    def update 
     @user = User.find(params[:id]) 
     if @user.update_attributes(params[:user]) 
     redirect_to user_url(current_user.username), :flash => { :success => "success" } 
     else 
     redirect_to user_url(current_user.username), :error => { :error => "shit" } 
     end 
    end 

路線

resources :users do 
    resources :friends 
    end 

    match '/:username' => 'users#show', :as => "user" 

形式

<%= form_for @user do |form| %> 
<%= render 'shared/error_messages', :object => form.object %> 
<div class="form"> 
    <p> <%= form.label :description, "Message to friends" %> <br /> 
    <%= form.text_area :description %> </p> 

    <%= form.submit %> 
</div> 
<% end %> 

開發日誌

Started GET "https://stackoverflow.com/users/1/edit" for 127.0.0.1 at Wed Jan 05 19:07:28 -0500 2011 
    Processing by UsersController#edit as HTML 
    Parameters: {"id"=>"1"} 
    User Load (0.2ms) SELECT "users".* FROM "users" WHERE ("users"."id" = 1) LIMIT 1 
Rendered shared/_error_messages.html.erb (0.6ms) 
ApplicationController::current_user 
ApplicationController::current_user_session 
    CACHE (0.0ms) SELECT "users".* FROM "users" WHERE ("users"."id" = 1) LIMIT 1 
    CACHE (0.0ms) SELECT "users".* FROM "users" WHERE ("users"."id" = 1) LIMIT 1 
ApplicationController::current_user_session 
ApplicationController::current_user 
ApplicationController::current_user 
Rendered users/edit.html.erb within layouts/application (27.6ms) 
Completed 200 OK in 53ms (Views: 38.7ms | ActiveRecord: 0.3ms) 


    Started POST "/1" for 127.0.0.1 at Wed Jan 05 19:08:06 -0500 2011 
     Processing by UsersController#show as HTML 
     Parameters: {"commit"=>"Update User", "authenticity_token"=>"OM1lIzizuFCYlxC3XmtmG/btqAsyjekHtqsiwlUDn3M=", "utf8"=>"✓", "username"=>"1", "user"=>{"description"=>"Hello people! Give me your address. Get a postcard."}} 
     User Load (0.2ms) SELECT "users".* FROM "users" WHERE ("users"."username" = '1') LIMIT 1 
    Redirected to http://0.0.0.0:3000/ 
    ApplicationController::current_user 
    ApplicationController::current_user_session 
     User Load (0.3ms) SELECT "users".* FROM "users" WHERE ("users"."id" = 1) LIMIT 1 
     CACHE (0.0ms) SELECT "users".* FROM "users" WHERE ("users"."id" = 1) LIMIT 1 
    ApplicationController::current_user_session 
    Completed 302 Found in 102ms 

相關耙路線：

users GET /users(.:format)        {:controller=>"users", :action=>"index"} 
           POST /users(.:format)        {:controller=>"users", :action=>"create"} 
         new_user GET /users/new(.:format)       {:controller=>"users", :action=>"new"} 
         edit_user GET /users/:id/edit(.:format)     {:controller=>"users", :action=>"edit"} 
          user GET /users/:id(.:format)       {:controller=>"users", :action=>"show"} 
           PUT /users/:id(.:format)       {:controller=>"users", :action=>"update"} 
           DELETE /users/:id(.:format)       {:controller=>"users", :action=>"destroy"} 

Answer 1

您的代碼對我來說看起來不錯，但日誌顯示窗體並未呈現包含「put」的隱藏_method字段。這可能是由form_for助手不會將@user識別爲現有記錄所致。我不知道爲什麼這可能發生，但臨時的解決辦法是將以下添加到您的form_for助手：

:html => { :method => :put} 

Answer 2

@Beerlington。你的回答非常接近，讓我找到了一個解決方案。定義該方法並沒有做到這一點，但是定義了這個行爲的是什麼。

<%= form_for @user, :url => { :action => "update" } do |form| %> 

由於某種原因，這樣做了......不知道爲什麼該操作未定義爲更新。

Answer 3

查看爲您的表單生成的HTML。我打賭的行動看起來像

action="/1" 

所以，當提交表單時，你的路線文件說

match '/:username' => 'users#show', :as => "user" 

，這是你在哪裏發送

Started POST "/1" for 127.0.0.1 at Wed Jan 05 19:08:06 -0500 2011 
    Processing by UsersController#show as HTML 

我想form_for依賴於to_param來爲表單生成動作。既然你寫了它，你會得到意想不到的行爲。