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我为嵌套模型的控制器语法而苦苦挣扎。还有很多其他问题，但我没有任何运气，我已经达到了 2 天的挣扎门槛，所以是时候问了！

我有 3 个模型，用户、农场、产品。- 用户 has_many 农场，农场 has_many 产品。

在用户显示页面上，我部分显示了用户创建的农场列表...

#users_controller
def show
    @user = User.find(params[:id]) 
    @farms = @user.farms   
  end

#show.html.erb
 <% if @user.farms.any? %>
   <center><h4>My Farms(<%= @user.farms.count %>)</h4></center>
   <hr>
<%= render @farms %>

这按预期工作。

我想做的是在_farm部分中显示农场的所有产品作为列表。但是我不知道要向控制器添加什么？添加

@products = Product.find(params[:id])

显然展示了所有产品，而不仅仅是那个农场生产的产品。那么如何创建控制器代码和/或部分代码以仅显示该特定农场创建的产品？

我在想……

@products = Product.find(params[:farm_id])

但它不起作用，似乎很简单！

我显然需要将密钥传递给局部中的局部，但我不知道该怎么做！

任何帮助将不胜感激......它让我发疯！

非常感谢，亚历克斯

编辑 ：：

#product.rb
class Product < ActiveRecord::Base
  attr_accessible :description, :farm_id, :name, :ammount, :price, :category, :pic, :longitude, 
  :latitude, :image

  belongs_to :farm

 mount_uploader :image, ImageUploader


#farm.rb
class Farm < ActiveRecord::Base

  attr_accessible :content, :name, :user_id, :description, :street_name, :bldg_name, :region, :post_code, 
                        :province, :contact_number, :swap, :organic, :deliver, :image, :products_attributes


  belongs_to :user
  has_many :products
 acts_as_followable
  validates :user_id, presence: true
accepts_nested_attributes_for :products
  mount_uploader :image, ImageUploader


#user.rb
class User < ActiveRecord::Base

  mount_uploader :avatar, ImageUploader
  # Include default devise modules. Others available are:
  # :token_authenticatable, :confirmable,
  # :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :confirmable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :email, :password, :password_confirmation, :remember_me, :name, :region, 
    :description, :avatar, :street_name, :bldg_name, :post_code, :province, :contact_number, :avatar, 
    :avatar_cache, :remove_avatar, :products_attributes, :product

  # attr_accessible :title, :body

  acts_as_follower

  has_many :farms
  has_many :swaps
  has_many :products, :through => :farms

  # validates_presence_of   :image
  # validates_integrity_of  :image
  # validates_processing_of :image

  has_private_messages

编辑 2::

#_products.html.erb

<hr>
<div class="row-fluid">

      <div class="span3"> <%= image_tag product.image_url(:thumb) %> </div>  

      <div class="span5"> 
         <h2><%= product.name %></h2>
         <table>
<tr>
<td><strong>Ammount Available ::</strong></td>
<td><center><%= product.ammount %></center></td>
<td><strong>Kilos</strong></td>

</tr>
<tr>
<td><strong>Price/Kilo ::</strong></td>
<td><center><%= product.price %></center></td>
<td><strong>Euros</strong></td>
</tr></table>
      </div>     
      <br><br><br>
      <div class="span3">   
<%= link_to "View Product", product, class: "btn btn-small btn-secondary"  %>
<% if correct_user?(@user) %>
  <%= link_to "delete", product, class: "btn btn-small btn-secondary", method: :delete, confirm: "You sure?" %><% end %>


      </div>

-

#_farm.html.erb
<div class="<%= cycle("even", "odd") %>">
<div class="container">

<div class="row-fluid">
  <div class="span2">
    <%= image_tag farm.image_url %>
  </div>

  <div class="span2">
    <%= farm.name %>
  </div>

  <div class="span4">
    <span><%=  "   Location  ::  " %><%= farm.user.region %></span><br>
    <span><%=  "   Can it be delivered  ::  " %><%= farm.deliver ? 'No' : 'Yes' %></span><br>
    <span><%=  "   Is it Organic  ::  " %><%= farm.organic ? 'Yes' : 'No'  %></span><br>
    <span class="timestamp">Listed on <%= farm.created_at.strftime("%d %b. %Y") %> </span>


  </div>
  <div class="span4">
<br>
<br>
<br>

<%= link_to 'Sell A Product', new_farm_product_path(farm), class: "btn btn-small btn-secondary" %> 
<%= link_to 'Edit Grow Spot', farm, class: "btn btn-small btn-secondary" %> 
  </div>         
 </div><!-- end container -->  
</div>

<div class="row-fluid">
  <div class="span2"></div>
  <div class="span8">

<% for product in farm.products do %>
  <%= render :partial => "product", :product => product %>
<% end %>

  </div>
  <div class="span2"></div>
4

1 回答 1

0

在视图中使用<%= render @farms %>意味着您必须有一个局部调用_farm.html.erbapp/views/farms

在该部分中，您可以使用farm变量：

<% for product in farm.products do %>
  <%= product.name %>
  <%= product.price %>
  .... 
<% end %>

无需在控制器中添加任何内容。

更新

<% for product in farm.products do %>
  <%= render :partial => "product", :locals => { :product => product } %>
<% end %>

在app/views/farms/_product.html.erb

<div class="zzz">
   <div><%= product.price %></div>
</div>
于 2013-06-25T13:20:02.127 回答