如何显示链接模型的项目

Question

我有2个模型("攻击"one_answers" forceCeType"(，其中有一个has_many关系由JOIN表" lk_offence_types"管理。

在"犯罪"的index.html.erb中，我无法显示一个标准项目。(我已经尝试了委派，但似乎不适合has_many ..(

进攻模型：

class Offence < ApplicationRecord
    has_many :lk_offence_types, inverse_of: :offence, dependent: :destroy
    has_many :offence_types, through: :lk_offence_types
    #delegate :offence_type_description, to: :offence_type
end

关注模型：

class OffenceType < ApplicationRecord
    has_many :lk_offence_types
    has_many :offences, through: :lk_offence_types
end

lkoffenceType模型：

class LkOffenceType < ApplicationRecord
  belongs_to :offence_type, inverse_of: :lk_offence_types
  belongs_to :offence, inverse_of: :lk_offence_types  
end

进攻索引.html.erb：

<% @offences.each do |offence| %>
<tr>
<td><%= offence.offence_description %></td>
<td><%= offence.offence_types.offence_type_description %></td>
<% end %>

＆lt;％= rence.offence_types.offence_type_description％>给我一个错误。我也尝试了：＆lt;％= rence.offence_type_description％>和其他siyntaxes ...

我缺少什么？

(我使用Ruby 2.3和Rails 5.0.2(

谢谢

Answer 1

您也需要在offence types上循环。您可能需要修复样式，这只是为了让您了解缺少的内容。

<% offence.offence_types.each do |ot| %>
 <td><%= ot.offence_type_description %></td>
<% end %>