Question

我有3个型号：

空缺

has_many :address_vacancies
has_many :addresses, through: :address_vacancies

地址

has_many :address_vacancies
has_many :vacancies, through: :address_vacancies

AddressVacancy

belongs_to :address
belongs_to :vacancy

以我的形式使用以下代码：

<%= f.collection_select :address_id, Address.order("CREATED_AT DESC"),:id,:title, include_blank: true %>

会抛出错误：undefined method address_id'，为什么会这样，我做错了什么？

修改

完整表格如下：

<%= form_for(@vacancy) do |f| %>
  <% if @vacancy.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@vacancy.errors.count, "error") %> prohibited this vacancy from being saved:</h2>

      <ul>
      <% @vacancy.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= f.label :title %><br>
    <%= f.text_field :title %>
  </div>
  <div class="field">
    <%= f.label :address %>
    <%= f.collection_select :address, Address.order("CREATED_AT DESC"),:id,:title, include_blank: true %>
  </div>
  <div class="field">
    <%= f.label :signup_until %><br>
    <%= f.date_select :signup_until %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

Answer 1

此：

<div class="field">
  <%= f.label :address %>
  <%= f.collection_select :address, Address.order("CREATED_AT DESC"),:id,:title, include_blank: true %>
</div>

由于Vacancy没有单一的地址属性，因此在form_for @vacancy表单（来自Vacancy）的上下文中无效。它通过has_many关联拥有一组地址。由于同样的原因，使用:address_id也是无效的。

如果要编辑一个空缺的各种地址，则需要一个子表单。您在模型中使用accepts_nested_attributes_for，在视图中使用fields_for。

<%= form_for @vacancy do |f| %>
  ...

  <%= f.fields_for :addresses do |af| %>
    ...
    <!-- Here you'd render a partial or a set of inputs for this address %>
    <%= af.input :street %> <!-- e.g., if there's a street attribute for Address -->
    ...
  <% end %>

  ...
<% end %>

Rails一直没有工作

1 个答案: