嵌套屬性不保存到ActiveRecord的

Question

我已經堆棧現在充溢了一段時間，我已經做了一些教程/網路上的演練，包括RailsGuides & Railscasts，但我似乎遇到了問題救了我的嵌套的屬性我數據庫。

我的投注，其中有許多條款

class Wager < ActiveRecord::Base 
    has_and_belongs_to_many :users 
    belongs_to :host, class_name: "User", foreign_key: "host_id" 
    belongs_to :guest, class_name: "User", foreign_key: "guest_id" 
    has_many :terms, :dependent => :destroy 
    accepts_nested_attributes_for :terms, allow_destroy: true , :reject_if => lambda { |a| a[:terms].blank? } 

    attr_accessible :title, :description, :terms, :terms_attributes 

end 

和術語

class Term < ActiveRecord::Base 
    belongs_to :wager 
    attr_accessible :title, :body, :criterion, :host_criterion, :guest_criterion, :terms_attributes 
end 

我的投注控制器

class WagersController < ApplicationController 

    before_filter :authenticate_user! 

    def index 

    end 

    def create 
    # Create new wager from params 
    @wager = Wager.new(params[:wager]) 
    # Assign current user 
    @wager.host_id = current_user.id 
    # Assign guest user here 
    # ______________________ 
    @term = @wager.terms.build(params[:terms]) 

    if @wager.valid? 
     respond_to do |format| 
     if @wager.save 
      format.html { redirect_to(@wager, :notice => 'Wager Stub successfully created.') } 
      format.xml { render :xml => @wager, :status => :created, :location => @wager } 
     else 
      format.html { render :action => "new" } 
      format.xml { render :xml => @wager.errors, :status => :unprocessable_entity } 
     end 
     end 
    end 

    def new 
    @wager = Wager.new 
    @term = Term.new 
    3.times { @wager.terms.build } 
    end 
end 

我的新觀點：

<h2>Create a Wager</h2> 

<%= form_for @wager, url: {action: "create"}, html: {class: ""} do |f| %> 
    <fieldset> 
    <legend>Create a wager</legend> 

<div class="row"> 
    <div class="large-12 columns"> 
    <label>Title</label> 
     <%= f.text_field :title, placeholder: "The Bet To End All Bets" %> 
    </div> 
</div> 

<div class="row"> 
    <div class="large-4 columns"> 
     <label>With</label> 
      <%#= f.text_field :guest, placeholder: "Choose a Friend" %> 
    </div> 
    <div class="large-8 columns"> 
    </div> 
</div> 

<div class="row"> 
     <div class="large-12 columns"> 
    <label>Description</label> 
    <%= f.text_area :description, size: "60x12", placeholder: "What's all this about?" %> 
    </div> 
</div> 

<div class="row"> 
    <div class="large-5 columns"> 
    <div class="row collapse"> 
     <h4>Your Terms</h4> 
      </div> 

     <%= f.fields_for :terms do |term_form| %> 
     <%= term_form.label :host_criterion, 'Term:' %> 
     <%= term_form.text_field :host_criterion %> 
     <% end %> 
    </div> 

    <div class="large-5 columns"> 
    <div class="row collapse"> 
     <h4>Their Terms</h4> 
    </div> 

    <%= f.fields_for :terms do |term_form| %> 
     <%= term_form.label :guest_criterion, 'Term:' %> 
     <%= term_form.text_field :guest_criterion %> 
    <% end %> 
    </div> 

    </div> 


<div class="row"> 
<div class="large-8 columns"> 
</div> 
<div class="large-4 columns"> 
    <%= f.submit "Create Stub", class: "button" %> 
</div> 
</div> 
</fieldset> 

我的參數是這樣的：（SPOILER ALERT：他們都是零。除了它分配一個賭注ID。敢肯定這是由於構建方法）

=> 
"wager"=> 
{"title"=>"Title of the Bet", 
    "description"=>"Bet description", 
"terms_attributes"=> 
    {"0"=>{"host_criterion"=>"You gotta be nude"}, 
    "1"=>{"host_criterion"=>"no drinking"}, 
    "2"=>{"host_criterion"=>"can't brush your hair"}, 
    "3"=>{"guest_criterion"=>"Guest Term 1"}, 
    "4"=>{"guest_criterion"=>"Guest Term 2"}, 
    "5"=>{"guest_criterion"=>"Guest Term 3"}}}, 
    "commit"=>"Create Stub", 
    "action"=>"create", 
    "controller"=>"wagers"} 

然而，當保存記錄，我的服務器日誌說：

User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = 5 LIMIT 1 
(0.6ms) begin transaction 
SQL (1.9ms) INSERT INTO "wagers" ("created_at", "deadline", "description", "guest_id", "host_id", "title", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?) [["created_at", Thu, 17 Oct 2013 23:50:50 UTC +00:00], ["deadline", nil], ["description", "Bet description"], ["guest_id", nil], ["host_id", 5], ["title", "Title of the Bet"], ["updated_at", Thu, 17 Oct 2013 23:50:50 UTC +00:00]] 
SQL (0.3ms) INSERT INTO "terms" ("created_at", "criterion", "guest_criterion", "host_criterion", "updated_at", "wager_id") VALUES (?, ?, ?, ?, ?, ?) [["created_at", Thu, 17 Oct 2013 23:50:50 UTC +00:00], ["criterion", nil], ["guest_criterion", nil], ["host_criterion", nil], ["updated_at", Thu, 17 Oct 2013 23:50:50 UTC +00:00], ["wager_id", 48]] 
(1.0ms) commit transaction 
Redirected to http://localhost:3000/wagers/48 
Completed 302 Found in 121668ms (ActiveRecord: 5.9ms) 

我缺少什麼？我們的目標是爲每個條款（最多6條）創建一個術語，並與投注一起提交。我非常感謝這方面的幫助，因爲我在網上找到的演練大部分都讓我明白了這一點，但它只是最終爲他們工作（Rails糖風格），驗證等等。 ： -/

Running Rails 3.2.13。

Answer 1

, :reject_if => lambda { |a| a[:terms].blank? }正在阻止其工作。

相反，它應該是：reject_if: lambda { |terms| terms[:host_criterion].blank? } 注：我換成「一」和「術語」爲清楚起見

與第一個軌道會尋找一個叫「條款」字段中的問題「條款」表。相反，它應該查找「host_criterion」。

revised railscast完全刪除此方法，並使用coffeescript來驗證在客戶端執行此操作（防止術語表中的空記錄）。

Answer 2

我會使用@term for them_terms的東西。試試吧，讓我知道它是否有效。

或更好會使用術語表爲their_terms創建一個新的關係。