Question

我是铁杆新手，我卡住了，我有两个型号，

lodge.rb

class Lodge < ActiveRecord::Base
  has_many :lodgedetails
  accepts_nested_attributes_for :lodgedetails
end

lodgedetail.rb

class Lodgedetail  < ActiveRecord::Base
  belongs_to :lodge
end

lodge_controller.rb

def show   
    @lodge = Lodge.all
    @lodgedetails = Lodgedetail.all
end

show.html.erb

<% @lodgedetails.each do |l|%>
    <tr>
        <td><%= l.lodge.name %></td>
        <td><%= l.lodge.address %></td>
        <td><%= l.lodge.about %></td>

        <td><%=  l.try(:contact) %></td>
        <td><%=  l.try(:email) %></td>

        <td><%= l.lodge.facility %></td>
        <td><span class='glyphicon glyphicon-edit'></span></td>

    </tr>
    <% end %>

现在当我有2个联系人，2个电子邮件给一个小屋时，它将显示整个行两次。我如何修改它以便它将显示一次记录，如果联系人字段或电子邮件字段有2个值，它应该显示在同一行中，如

name address about contact1,contact2  email1,email2  facility

而不是

name address about contact1 email1 facility
name address about contact2 email2 facility

Answer 1

这个怎么样：

<% @lodge.each do |l|%>
  <tr>
    <td><%= l.name %></td>
    <td><%= l.address %></td>
    <td><%= l.about %></td>
    <td>
      <% l.lodgedetails.each do |ld| %>
        <%= ld.contact %>,
        <%= ld.email %>,
      <% end %>
    </td>
    <td><%= l.facility %></td>
    <td><span class='glyphicon glyphicon-edit'></span></td>
  </tr>
<% end %>

Answer 2

只需更改迭代方式

<% @lodge.each do |ldge|%>
    <tr>
  <% ldge.lodgedetails.each do |l|%>

        <td><%= l.lodge.name %></td>
        <td><%= l.lodge.address %></td>
        <td><%= l.lodge.about %></td>

        <td><%=  l.try(:contact) %></td>
        <td><%=  l.try(:email) %></td>

        <td><%= l.lodge.facility %></td>
        <td><span class='glyphicon glyphicon-edit'></span></td>

    <% end %>

    </tr>
 <% end %>

你不需要这样做

@lodgedetails = Lodgedetail.all

Rails方式是

@lodge[0].lodgedetails

如何从多个模型中获取和显示数据

2 个答案: