Question

我有两个模型，内容和页面

class Content < ActiveRecord::Base
   attr_accessible :large_description, :short_description
   belongs_to :contentable , :polymorphic => true
end

class Page < ActiveRecord::Base
   extend FriendlyId
   friendly_id :title, use: [:slugged, :history]
   attr_accessible :active, :menu, :slug, :title, :contents

   validates :title, presence: true

   has_many :contents, as: :contentable
end

这是我创建包含内容的新页面的简单表格

<%= form_for([:admin,@page], :html => {:class => "nice custom"}) do |f| %>
  <div class="formRow">
    <%= f.label :title, "Title"%>
    <%= f.text_field :title, :class => 'input-text'%>
  </div>
<%= f.fields_for :contents do |content_form| %>
  <div class="formRow">
   <%= content_form.label :short_description, "Short Description"%>
   <%= content_form.text_area :short_description, :class => 'tinymce expand'%>
  </div>
  <div class="formRow">
    <%= content_form.label :large_description, "Large Description"%>
    <%= content_form.text_area :large_description, :class => 'tinymce expand'%>
  </div>
<% end %>
 <div class="formRow">
    <%= f.submit "Create", :class => 'button small nice blue'%>
 </div>
<% end %>

最后这是我的页面控制器

class Admin::PagesController < ApplicationController
  layout 'admin'
  def index
    @pages = Page.order("created_at")
  end
  def new
    @page = Page.new
  end
  def create
    @page = Page.new(params[:page])
    if @page.save
     redirect_to page_url
    else
     render :new
     end
  end

  def show
    @page = Page.find(params[:id])
  end

  def destroy
    @page = Page.find(params[:id])
    @page.destroy
    redirect_to page_url
  end
end

我使用了命名空间Admin。所以问题是当我发送表格时，我收到这个错误而且我不知道为什么不匹配：

Admin :: PagesController #create中的ActiveRecord :: AssociationTypeMismatch   内容（＃70150608194420）预期，得到阵列（＃70150590276780）

activerecord（3.2.8）   LIB / active_record /协会/ association.rb：204：在   raise_on_type_mismatch' activerecord (3.2.8) lib/active_record/associations/collection_association.rb:308:in块   替换＆＃39; activerecord（3.2.8）   lib / active_record / associations / collection_association.rb：308：在each' activerecord (3.2.8) lib/active_record/associations/collection_association.rb:308:in替换＆＃39; activerecord（3.2.8）   LIB / active_record /协会/ collection_association.rb：41：在   writer' activerecord (3.2.8) lib/active_record/associations/builder/association.rb:51:in阻止   define_writers＆＃39; activerecord（3.2.8）   lib / active_record / attribute_assignment.rb:94：block in assign_attributes' activerecord (3.2.8) lib/active_record/attribute_assignment.rb:93:in每个＆＃39; ActiveRecord的   （3.2.8）lib / active_record / attribute_assignment.rb:93:in   assign_attributes' activerecord (3.2.8) lib/active_record/base.rb:498:in初始化＆＃39;   app / controllers / admin / pages_controller.rb：13：在new' app/controllers/admin/pages_controller.rb:13:in创建＆＃39; ActionPack的   （3.2.8）lib / action_controller / metal / implicit_render.rb：4：in   send_action' actionpack (3.2.8) lib/abstract_controller/base.rb:167:in process_action＆＃39; ActionPack的   （3.2.8）lib / action_controller / metal / rendering.rb：10：in   进程中的process_action' actionpack (3.2.8) lib/abstract_controller/callbacks.rb:18:in阻止＆＃39;   activesupport（3.2.8）lib / active_support / callbacks.rb：414：in   _run__3558390125630086563__process_action__2004224720818030891__callbacks' activesupport (3.2.8) lib/active_support/callbacks.rb:405:in __ run_callback＆＃39; activesupport（3.2.8）   lib / active_support / callbacks.rb：385：在_run_process_action_callbacks' activesupport (3.2.8) lib/active_support/callbacks.rb:81:in run_callbacks＆＃39; actionpack（3.2.8）   lib / abstract_controller / callbacks.rb：17：在process_action' actionpack (3.2.8) lib/action_controller/metal/rescue.rb:29:in process_action＆＃39;   actionpack（3.2.8）   lib / action_controller / metal / instrumentation.rb：30：在block in process_action' activesupport (3.2.8) lib/active_support/notifications.rb:123:in块中的仪器＆＃39;   activesupport（3.2.8）   lib / active_support / notifications / instrumenter.rb：20：在instrument' activesupport (3.2.8) lib/active_support/notifications.rb:123:in工具＆＃39; actionpack（3.2.8）   lib / action_controller / metal / instrumentation.rb：29：在process_action' actionpack (3.2.8) lib/action_controller/metal/params_wrapper.rb:207:in process_action＆＃39;   activerecord（3.2.8）   LIB / active_record / railties / controller_runtime.rb：18：在   process_action' actionpack (3.2.8) lib/abstract_controller/base.rb:121:in过程＆＃39; actionpack（3.2.8）   lib / abstract_controller / rendering.rb：45：在process' actionpack (3.2.8) lib/action_controller/metal.rb:203:in发送＆＃39; ActionPack的   （3.2.8）lib / action_controller / metal / rack_delegation.rb：14：in   dispatch' actionpack (3.2.8) lib/action_controller/metal.rb:246:in阻止行动＆＃39; actionpack（3.2.8）   lib / action_dispatch / routing / route_set.rb：73：在call' actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:73:in发送＆＃39;   actionpack（3.2.8）lib / action_dispatch / routing / route_set.rb:36:in   call' journey (1.0.4) lib/journey/router.rb:68:in阻止通话＆＃39;   旅程（1.0.4）lib / journey / router.rb：56：在each' journey (1.0.4) lib/journey/router.rb:56:in电话＆＃39; actionpack（3.2.8）   lib / action_dispatch / routing / route_set.rb：600：call' actionpack (3.2.8) lib/action_dispatch/middleware/best_standards_support.rb:17:in来电＆＃39; rack（1.4.1）lib / rack / etag.rb:23:in call' rack (1.4.1) lib/rack/conditionalget.rb:35:in call＆＃39; actionpack（3.2.8）   lib / action_dispatch / middleware / head.rb:14:in call' actionpack (3.2.8) lib/action_dispatch/middleware/params_parser.rb:21:in来电＆＃39;   actionpack（3.2.8）lib / action_dispatch / middleware / flash.rb：242：in   call' rack (1.4.1) lib/rack/session/abstract/id.rb:205:in上下文＆＃39;   rack（1.4.1）lib / rack / session / abstract / id.rb：200：call' actionpack (3.2.8) lib/action_dispatch/middleware/cookies.rb:339:in来电＆＃39;   activerecord（3.2.8）lib / active_record / query_cache.rb:64:in call' activerecord (3.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in call＆＃39; actionpack（3.2.8）   lib / action_dispatch / middleware / callbacks.rb:28:in block in call' activesupport (3.2.8) lib/active_support/callbacks.rb:405:in 运行 _3479256987463636693_ 致电 _4454778504255292268__callbacks＆＃39;   activesupport（3.2.8）lib / active_support / callbacks.rb：405：in   __run_callback' activesupport (3.2.8) lib/active_support/callbacks.rb:385:in _ run_call_callbacks＆＃39;   activesupport（3.2.8）lib / active_support / callbacks.rb:81:in   run_callbacks' actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:27:in呼叫＆＃39; ActionPack的   （3.2.8）lib / action_dispatch / middleware / reloader.rb:65:in call' actionpack (3.2.8) lib/action_dispatch/middleware/remote_ip.rb:31:in call＆＃39; actionpack（3.2.8）   lib / action_dispatch / middleware / debug_exceptions.rb:16:in call' actionpack (3.2.8) lib/action_dispatch/middleware/show_exceptions.rb:56:in call＆＃39;   railties（3.2.8）lib / rails / rack / logger.rb:26:in call_app' railties (3.2.8) lib/rails/rack/logger.rb:16:in来电＆＃39; actionpack（3.2.8）   lib / action_dispatch / middleware / request_id.rb:22:in call' rack (1.4.1) lib/rack/methodoverride.rb:21:in来电＆＃39;机架（1.4.1）   lib / rack / runtime.rb:17:in call' activesupport (3.2.8) lib/active_support/cache/strategy/local_cache.rb:72:in call＆＃39;架   （1.4.1）lib / rack / lock.rb:15:in call' actionpack (3.2.8) lib/action_dispatch/middleware/static.rb:62:in call＆＃39;铁路（3.2.8）   lib / rails / engine.rb：479：在call' railties (3.2.8) lib/rails/application.rb:223:in来电＆＃39;机架（1.4.1）   lib / rack / content_length.rb:14:in call' railties (3.2.8) lib/rails/rack/log_tailer.rb:17:in来电＆＃39;机架（1.4.1）   lib / rack / handler / webrick.rb:59:in service' /Users/ogonbat/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/webrick/httpserver.rb:138:in service＆＃39;   /Users/ogonbat/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/webrick/httpserver.rb:94:in   {_ 1}}阻止了start_thread＆＃39;

这是请求参数

{＆＃34; UTF8＆＃34; = GT;＆＃34;✓＆＃34 ;,   ＆＃34; authenticity_token＆＃34; = GT;＆＃34; g44p + IPxvdm2ouGAE2u2dV / cCKK8uF6G3XLL4z26zrI =＆＃34 ;,   ＆＃34;页面＆＃34; = GT; {＆＃34;标题＆＃34; = GT;＆＃34; zfdzfdsf＆＃34 ;,   ＆＃34;内容＆＃34; = GT; {＆＃34; SHORT_DESCRIPTION＆＃34; = GT;＆＃34;

sdfdsf
＆＃34 ;,   ＆＃34; large_description＆＃34; =＆gt;＆＃34;
dsfdsf
＆＃34;}}，＆＃34;提交＆＃34; =＆gt;＆＃34;创建＆＃34;}

提前感谢您的帮助

Answer 1

如果页面为has_many :contents，那么奇怪params[:page][:contents]是哈希而不是数组......

修复不一致的一端或另一端。如果你有一个has_many真实关系，并且你想为它创建一个表单，在主对象中为它预填充一些空项，并迭代它们，生成相应的字段。

您可以查看对{{3}}的所有回复，以了解您的需求。

Answer 2

尝试将accepts_nested_attributes_for :contents添加到您的Page模型中，我相信这应该是诀窍（基本上，它应该从params [：page] [：contents]构建关联的contents记录数组）

修改

您还应该将contents_attributes attr_accessible作为{{1}}属性添加到其中

多态模型，Forms和AssociationTypeMismatch

2 个答案: