创建视图以在 Ruby on Rails 应用程序中添加嵌套资源
我正在制作一个具有 3 个资源的 RoR 应用程序，这些资源按以下顺序嵌套：项目 ->饲料 -> XML_Fields。项目 has_many Feeds，Feeds has_many XML_Fields。我的问题是，我在向 Show Feeds 视图添加添加新 XML_Field 的功能时遇到了困难。我的代码如下：
<h2>Add an XML field:</h2>
<%= form_for ([@feed, @feed.xml_fields.build]) do |f| %>
<div class="field">
<%= f.text_area :tag %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
执行此操作会返回 NoMethodError: undefined method 'tag'。 Tag 是我创建的 xml_fields 表中的列的名称。我的 xml_fields_controller 有这个创建方法：
def create
@xml_field = Feed.find(params[:feed_id]).xml_fields.build(params[:xml_field])
respond_to do |format|
if @xml_field.save
format.html { redirect_to( :back, :notice => 'XML Field was successfully created.') }
format.xml { render :xml => @xml_field, :status => :created, :location => [@xml_field.feed, @xml_field] }
else
format.html { render :action => "new" }
format.xml { render :xml => @xml_field.errors, :status => :unprocessable_entity }
end
end
end
我的路由文件如下所示：
resources :projects do
resources :feeds
end
resources :feeds do
resources :xml_fields
end
有什么建议可以让这个 NoMethodError 消失吗？谢谢。
I'm making a RoR app that has 3 resources, that are nested in this order: Projects -> Feeds -> XML_Fields. Projects has_many Feeds, Feeds has_many XML_Fields. My problem is that I am getting stuck on adding to the Show Feeds view the ability to add a new XML_Field. My code is below:
<h2>Add an XML field:</h2>
<%= form_for ([@feed, @feed.xml_fields.build]) do |f| %>
<div class="field">
<%= f.text_area :tag %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
Executing this returns a NoMethodError: undefined method 'tag'. Tag is the name of the column in the xml_fields table I created. My xml_fields_controller has this create method:
def create
@xml_field = Feed.find(params[:feed_id]).xml_fields.build(params[:xml_field])
respond_to do |format|
if @xml_field.save
format.html { redirect_to( :back, :notice => 'XML Field was successfully created.') }
format.xml { render :xml => @xml_field, :status => :created, :location => [@xml_field.feed, @xml_field] }
else
format.html { render :action => "new" }
format.xml { render :xml => @xml_field.errors, :status => :unprocessable_entity }
end
end
end
And my routing file looks like this:
resources :projects do
resources :feeds
end
resources :feeds do
resources :xml_fields
end
Any suggestions to make this NoMethodError go away? Thanks.
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模型 XmlField 在数据库中没有标记字段；）
model XmlField doesn't have tag field in database ;)