Ruby for Rails collection_select不提交要建模的字段

Question

我在頁面上使用兩個collection_select助手。 列表本身已正確填充，但是當我提交表單時，會將NULL傳遞給插入。 不知道我在做什么錯。 更新：添加了控制器代碼

New.html.erb：

<h1>New map_apps_suite</h1>

<%= render 'form' %>

<%= link_to 'Back', map_apps_suites_path %>

表格代碼：

<%= form_for(@map_apps_suite) do |f| %>
  <% if @map_apps_suite.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@map_apps_suite.errors.count, "error") %> prohibited this map_apps_suite from being saved:</h2>

      <ul>
      <% @map_apps_suite.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

    <div>
        <%= f.label "Application Name:" %>
        <%= collection_select(:death_burrito_application, :id, DeathBurritoApplication.all, :id, :death_burrito_name, :prompt => true) %>
    </div>
        <br>
        <br>
    <div>
        <%= f.label "Project Name:" %>
        <%= collection_select(:custom_product_suite, :id, CustomProductSuite.all, :id, :product_suite_name, :prompt => true) %>
    </div>

  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

日志：

在2011年9月2日星期五12：07.0.1開始發布POST“ / map_apps_suites”，為127.0.0.1，由MapAppsSuitesController＃create處理為HTML
參數：{“ commit” =>“創建地圖應用套件”，“ death_burrito_application” => {“ id” =>“ 3200”}，“ authenticity_token” =>“ 0PP2U50CScjTbcUdRgbIjkExqo9k3psjlcf4w61ZpqI =”，“ utf8” =>“✓ “ custom_product_suite” => {“ id” =>“ 1”}} [1m [36mSQL（0.0ms）[0m [1mBEGIN [0m [1m [35mSQL（13.0ms）[0m describe map_apps_suites [1m [36mAREL（22.0ms） [0m [1mINSERT INTO map_apps_suites （ custom_product_suite_id ， death_burrito_application_id ）VALUES（NULL，NULL）[0m [1m [35mSQL（44.0ms）[0m COMMIT重定向至http：// localhost：3000 / map_apps_suites / 3已完成302在185ms內找到

新建的控制器代碼：

class MapAppsSuitesController < ApplicationController
  before_filter :get_apps, :only => [:new, :edit, :destroy, :update]
  before_filter :get_suites, :only => [:new, :edit, :destroy, :update]

  def get_apps
    @applications = DeathBurritoApplication.order(:death_burrito_name).all
  end

  def get_suites
    @custom_prod_suites = CustomProductSuite.order(:product_suite_name).all
  end

  def new
    @map_apps_suite = MapAppsSuite.new

    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @map_apps_suite }
    end
  end
  def create
    @map_apps_suite = MapAppsSuite.new(params[:map_apps_suite])
    Rails.logger.debug("Params: " + params.inspect)

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

Answer 1

我想你想在你保存custom_product_suite_id和death_burrito_application_id您map_apps_suites table

您可以使用以下兩種方法之一保存此文件

1]更改html並保留原樣的控制器代碼

<%= collection_select(:map_apps_suite, :death_burrito_application_id, DeathBurritoApplication.all, :id, :death_burrito_name, :prompt => true) %>


 <%= collection_select(:map_apps_suite, :custom_product_suite_id, CustomProductSuite.all, :id, :product_suite_name, :prompt => true) %>

或只需添加f. 到collection_select

<%= f.collection_select(:death_burrito_application_id, DeathBurritoApplication.all, :id, :death_burrito_name, :prompt => true) %>


 <%= f.collection_select(:custom_product_suite_id, CustomProductSuite.all, :id, :product_suite_name, :prompt => true) %>

2]更改以下創建方法，並按原樣保留html

    @map_apps_suite=MapAppsSuite.new(:custom_product_suite_id=>params[:custom_product_suite][:id], 
                             :death_burrito_application_id => params[:death_burrito_application_id][:id])

我希望這有幫助