我有一个包含三个模型的网络应用程序 - 客户，工作和客房。它们的关联如下：
class Customer < ActiveRecord::Base
has_many :jobs
class Job < ActiveRecord::Base
belongs_to :customer
has_many :rooms
class Room < ActiveRecord::Base
belongs_to :job
用户可以根据需要创建任意数量的房间。
目前，我的观点如下：
<div class="row">
<div class="panel panel-primary">
<div class="panel-heading">
<h3 class="panel-title center">Room Information</h3>
</div>
<div class="panel-body">
<ul class="nav nav-tabs" role="tablist">
<% @job.rooms.each do |room| %>
<li><%= link_to room.room_type %></li>
<% end %>
</ul>
<%= render 'layouts/roomview' %>
<div class="pull-right">
<%= link_to new_job_room_path(@job, @customer), class: "btn btn-primary" do %>
<span class="glyphicon glyphicon-plus"></span> Add New Room
<% end %>
</div>
</div>
</div>
</div>
在此视图中，我想点击每个标签，然后将房间视图部分渲染为与相应标签相关联的房间。
我的_roomview.html.erb部分内容如下：
<% @job.rooms.each do |job| %>
<div class="table-responsive">
<table class="table">
<tr>
<h4 class="info-text"><%= room.room_type %> Information</h4>
</tr>
<tr class="info">
<th class="col-md-2 info-text"><u>Room Details</u></th>
<th class="col-md-2"></th>
<th class="col-md-2 info-text"><u>Door Style Details</u></th>
<th class="col-md-2"></th>
<th class="col-md-2 info-text"><u>Drawer Box Details</u></th>
<th class="col-md-2"></th>
</tr>
<tr>
<td class="col-md-2"><strong>Room Type:</strong></td>
<td class="col-md-2"><%= room.room_type %></td>
<td class="col-md-2"><strong>Upper Door Style:</strong></td>
<td class="col-md-2"><%= room.upper_door_style %></td>
<td class="col-md-2"><strong>Drawer Box Style:</strong></td>
<td class="col-md-2"><%= room.drawer_box_style %></td>
</tr>
<tr>
<td class="col-md-2"><strong>Material Type:</strong></td>
<td class="col-md-2"><%= room.material %></td>
<td class="col-md-2"><strong>Lower Door Style:</strong></td>
<td class="col-md-2"><%= room.lower_door_style %></td>
<td class="col-md-2"><strong>Drawer Track Style:</strong></td>
<td class="col-md-2"><%= room.track_style %></td>
</tr>
<tr>
<td class="col-md-2"><strong>Material Details:</strong></td>
<td class="col-md-2"><%= room.material_details %></td>
<td class="col-md-2"><strong>Drawer Front Style:</strong></td>
<td class="col-md-2"><%= room.drawer_front_style %></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
</tr>
<tr>
<td class="col-md-2"><strong>Exterior Colour:</strong></td>
<td class="col-md-2"><%= room.exterior_colour %></td>
<td class="col-md-2"><strong>Panel Back Style:</strong></td>
<td class="col-md-2"><%= room.panel_back_style %></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
</tr>
<tr>
<td class="col-md-2"><strong>Interior Colour:</strong></td>
<td class="col-md-2"><%= room.interior_colour %></td>
<td class="col-md-2"><strong>Finished End Style:</strong></td>
<td class="col-md-2"><%= room.finished_ends %></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
</tr>
<tr class="info">
<th class="col-md-2 info-text"><u>Counter Top Details</u></th>
<th class="col-md-2"></th>
<th class="col-md-2 info-text"><u>Molding Details</u></th>
<th class="col-md-2"></th>
<th class="col-md-2 info-text"><u>Custom Order Details</u></th>
<th class="col-md-2"></th>
</tr>
<tr>
<td class="col-md-2"><strong>Counter Top Material:</strong></td>
<td class="col-md-2"><%= room.counter_top_material %></td>
<td class="col-md-2"><strong>Closed To Ceiling:</strong></td>
<td class="col-md-2"><%= room.closed_to_ceiling %></td>
<td class="col-md-2"><strong>Custom Order Name:</strong></td>
<td class="col-md-2"><%= room.order_name %></td>
</tr>
<tr>
<td class="col-md-2"><strong>Counter Top Supplier:</strong></td>
<td class="col-md-2"><%= room.counter_top_supplier %></td>
<td class="col-md-2"><strong>Crown Molding:</strong></td>
<td class="col-md-2"><%= room.crown_molding %></td>
<td class="col-md-2"><strong>Custom Order Details:</strong></td>
<td class="col-md-2"><%= room.order_description %></td>
</tr>
<tr>
<td class="col-md-2"><strong>Counter Top Colour:</strong></td>
<td class="col-md-2"><%= room.counter_top_colour %></td>
<td class="col-md-2"><strong>Under Cabinet Molding:</strong></td>
<td class="col-md-2"><%= room.under_cabinet_molding %></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
</tr>
<tr>
<td class="col-md-2"><strong>Counter Top Edge:</strong></td>
<td class="col-md-2"><%= room.counter_top_edge %></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
</tr>
<tr>
<td class="col-md-2"><strong>Counter Top Backsplash:</strong></td>
<td class="col-md-2"><%= room.backsplash %></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
</tr>
<tr>
<td class="col-md-2"><strong>Sink Install:</strong></td>
<td class="col-md-2"><%= room.sink_install %></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
<td class="col-md-2"></td>
</tr>
</table>
</div>
<% end %>
以下是我的路线：
resources :customers do
resources :jobs
end
resources :jobs do
resources :rooms
end
最后，这是我的工作展示控制器：
def show
@job = Job.find(params[:id])
@customer = Customer.find(params[:customer_id])
end
现在看来，当我加载视图时，我收到show action的控制器名称错误。该错误表明我有一个未定义的方法用于＆＃39; room＆＃39;。
考虑到我上面说明的功能 - 有人可以排除故障吗？我不确定如何构建show动作以正确渲染我的部分。
这是确切的错误字符串：
undefined local variable or method `room' for #<#<Class:0x007fa01f9827b0>:0x007fa01f9a8d48>
答案 0 :(得分：3)
这里有几个问题：
<强>控制器
如果您的模型是嵌套，为什么不在控制器调用中使用您的关联：
#app/controllers/jobs_controller.rb
class JobsController < ActiveRecord::Base
def show
@customer = Customer.find params[:customer_id]
@job = @customer.jobs.find params[:id]
end
end
效率更高！
错误
您的错误非常明确：
undefined local variable or method `room'
这意味着在show视图中的某个位置，您的应用会尝试引用room（本地var），而不会对其进行定义。如果没有具体提到相关错误，我将不得不解决问题的原因：
#app/views/jobs/_roomview.html.erb
<% @job.rooms ...
首先，以上是不正确的。在部分内容中，您需要通过"local" variables（否则，他们将失去modularity）：
<%= render partial: "roomview", locals: { job: @job } %>
使用以下内容会更好：
<%= render partial: "roomview", collection: @job.rooms, as: :room %>
#_roomview.html.erb
(no need for .each any more)
<div class="table-responsive"> ....
-
最后，我会看一下你如何调用show视图的各种依赖关系。特别是partial，还有links等。您有以下链接：
<%= link_to room.room_type %>
当然你最好打电话给<%= link_to "Room", room.room_type %>