Question

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

我有3个型号，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，我显示用户在部分...

中创建的服务器场列表

#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 %>

这可以按预期工作。

我想要做的是在_farm partial中显示服务器场的所有产品作为列表。但是我不知道要添加到控制器中的内容？添加

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

显然显示所有产品，而不仅仅是该农场生产的产品。那么如何创建控制器代码和/或部分代码只显示该特定服务器场创建的产品？

我正在考虑......

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

但它不起作用，似乎很简单！

我显然需要将某个键传递给局部内部的部分，但我不知道该怎么做！

任何帮助都将受到大力赞赏......它让我疯狂！

非常感谢，Alex

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>

Answer 1

在视图中使用<%= render @farms %>表示您必须在_farm.html.erb中有一个名为app/views/farms的部分

在那个部分你可以使用farm变量：

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

无需在控制器中添加内容。

<强>更新

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

app/views/farms/_product.html.erb

中的

<div class="zzz">
   <div><%= product.price %></div>
</div>

在用户索引/配置文件页面上显示嵌套模型部分

1 个答案: