Rails窗體幫助has_one belongs_to協會

我正在嘗試爲鏈接創建一個簡單的嵌套輸入字段。Rails窗體幫助has_one belongs_to協會

我konkurrancer型號：

accepts_nested_attributes_for :link 
has_one :link

我的鏈接模式：

class Link < ActiveRecord::Base 
belongs_to :konkurrancer 
end

我konkurrencer形式：

<%= simple_form_for [@konkurrancer] do |f| %> 
    <%= f.simple_fields_for :link do |d| %> 
    <%= d.input :link %> 
    <% end %> 
    <%= f.button :submit, :value => 'Opret konkurrence' %> 
    <% end %>

當我提交我的形式我得到這個錯誤：

ActiveRecord::UnknownAttributeError in Admin/konkurrancersController#create 

unknown attribute: links

個

參數：

{"utf8"=>"✓", 
"authenticity_token"=>"MACFM37hX4S6XA9vryn7gtfl21PvcaPBSiKDI8mfurg=", 
"konkurrancer"=>{"name"=>"sadasd", 
"links"=>{"link"=>"http://localhost:3000/konkurrancers/new"}, 
"commit"=>"Opret konkurrence"}

我的控制器：

def create 
    @konkurrancer = Konkurrancer.new(params[:konkurrancer]) 

    respond_to do |format| 
     if @konkurrancer.save 
     format.html { redirect_to(:admin_konkurrancers, :notice => 'Konkurrancer was successfully created.') } 
     format.xml { render :xml => :admin_konkurrancers, :status => :created, :location => @konkurrancer } 
     else 
     format.html { render :action => "new" } 
     format.xml { render :xml => @konkurrancer.errors, :status => :unprocessable_entity } 
     end 
    end 
    end

我的Rails控制檯日誌：

Started POST "/admin/konkurrancers" for 127.0.0.1 at 2011-04-27 01:40:50 +0200 
    Processing by Admin::KonkurrancersController#create as HTML 
    Parameters: {"utf8"=>"Ô£ô", "authenticity_token"=>"MACFM37hX4S6XA9vryn7gtfl21P 
vcaPBSiKDI8mfurg=", "konkurrancer"=>{"name"=>"sadasd", "banner2"=>"asdasdas", "t 
racking"=>"asdasdd", "vaerdi"=>"3434", "tid"=>"2 min", "tag_tokens"=>"2", "links 
"=>{"link"=>"http://localhost:3000/admin/konkurrancers/new"}, "kategori_id"=>"10 
", "form"=>"Nyhedsbrev", "partner"=>"Orville", "udtraekkes(1i)"=>"2011", "udtrae 
kkes(3i)"=>"27", "udtraekkes(2i)"=>"4", "note"=>""}, "commit"=>"Opret konkurrenc 
e"} 
    ←[1m←[36mKonkurrancer Load (1.0ms)←[0m ←[1mSELECT `konkurrancers`.* FROM `kon 
kurrancers`←[0m 
    ←[1m←[35mCACHE (0.0ms)←[0m SELECT `konkurrancers`.* FROM `konkurrancers` 
    ←[1m←[36mCACHE (0.0ms)←[0m ←[1mSELECT `konkurrancers`.* FROM `konkurrancers`← 
[0m 
    ←[1m←[35mAdmin Load (1.0ms)←[0m SELECT `admins`.* FROM `admins` WHERE (`admin 
s`.`id` = 1) LIMIT 1 
    ←[1m←[36mTag Load (1.0ms)←[0m ←[1mSELECT `tags`.* FROM `tags` WHERE (`tags`.` 
id` = 2) LIMIT 1←[0m 
    ←[1m←[35mSQL (1.0ms)←[0m BEGIN 
    ←[1m←[36mSQL (0.0ms)←[0m ←[1mCOMMIT←[0m 
Completed in 314ms 

ActiveRecord::UnknownAttributeError (unknown attribute: links): 
    app/controllers/admin/konkurrancers_controller.rb:48:in `new' 
    app/controllers/admin/konkurrancers_controller.rb:48:in `create' 

Rendered C:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.0.3/lib/action_dispatc 
h/middleware/templates/rescues/_trace.erb (2.0ms) 
    ←[1m←[35mKonkurrancer Load (0.0ms)←[0m SELECT `konkurrancers`.* FROM `konkurr 
ancers` LIMIT 15 OFFSET 0 
    ←[1m←[36mSQL (4.0ms)←[0m ←[1mSHOW TABLES←[0m 
    ←[1m←[35mSQL (4.0ms)←[0m SHOW TABLES 
    ←[1m←[36mSQL (4.0ms)←[0m ←[1mSHOW TABLES←[0m 
Rendered C:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.0.3/lib/action_dispatc 
h/middleware/templates/rescues/_request_and_response.erb (266.0ms) 
Rendered C:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.0.3/lib/action_dispatc 
h/middleware/templates/rescues/diagnostics.erb within rescues/layout (324.0ms)

來源

2011-04-26 Rails beginner

鑑於被拋出錯誤在您的控制器代碼中，如果您也發佈了該代碼，這將會很有幫助。 – Rob 2011-04-26 23:50:52

我已經發布了我的導軌控制檯日誌 – 2011-04-26 23:55:37

是的，現在該如何控制器代碼？ – Rob 2011-04-27 00:04:16

你想傳遞給控制器PARAMS看起來是這樣的：


      {"konkurrancer"=>{ 
        "name"=>"sadasd", 
        "link_attributes"=>{"link"=>"http://localhost:3000/konkurrancers/new"}, 
        "commit"=>"Opret konkurrence" 
        } 
       }

假設你的Link模型確實有一個 link字段。

因此，只要用這個鏈接模式：


    <%= f.simple_fields_for :link_attributes do |d| %>

，並更改d.input :link如果有必要（例如，如果鏈接表並沒有真正有一個link場）

http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html

來源

2011-04-27 00:09:02 klochner

我將在建立對象的控制器

@konkurrancer = Konkurrancer.new

@link = @konkurrancer.build_link

的新動作然後在表格

<%= f.simple_fields_for :link, @link do |d| %>

使用或在視圖中創建一個像這樣的新鏈接：在您的konkurrancer模型

<%= f.simple_fields_for :link, Link.new do |d| %>

來源

2011-04-27 01:29:24 ESwards

使用

attr_accessible :link_attribute 

accepts_nested_attributes_for :link

來源

2013-10-28 15:31:12 Ajey

Rails窗體幫助has_one belongs_to協會

回答

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