Ruby for Rails collection_select 不向模型提交字段

Question

我在一个页面上使用了两个 collection_select 助手。列表本身被正确填充，但是当我提交表单时，NULL 被传递给插入。不知道我在这里做错了什么。更新：添加了控制器代码

新建.html.erb：

<h1>New map_apps_suite</h1>

<%= render 'form' %>

<%= link_to 'Back', map_apps_suites_path %>

表格代码：

<%= 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：

9 月 2 日星期五 20:57:10 开始为 127.0.0.1 发布“/map_apps_suites” -0700 2011 由 MapAppsSuitesController 处理#create as HTML
参数：{"commit"=>"创建地图应用套件", "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 描述 map_apps_suites [1m[36mAREL (22.0ms)[0m [1mINSERT INTO map_apps_suites (custom_product_suite_id, death_burrito_application_id) 值 (NULL, NULL)[0m [1m[35mSQL (44.0ms)[0m COMMIT 重定向到 http://localhost:3000/map_apps_suites/3 Completed 302 Found in 185ms

新建控制器代码：

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

我想你想把你的custom_product_suite_id和death_burrito_application_id你的map_apps_suites table存起来

您可以使用以下两种方式之一保存它

1] 更改 html 并保持控制器代码不变

<%= 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) %>

或者只需将f. 添加到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] 像下面这样更改创建方法并保持 html 原样

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

希望对你有帮助