轨道在索引中显示字符串而不是 ID

Question

>我有以下表单，用户从活动中心页面上的数据库条目列表中选择一个部门。 我正在尝试显示部门字符串（:department）而不是部门ID。 我试过@activity_center.department.department但这不起作用。 有什么建议吗？

形式：

<%= f.select :department_id, options_from_collection_for_select(@departments, 'id', 'department'), hide_label: true, :multiple => false %>

部门模式：

class Department < ActiveRecord::Base
    validates :department, :presence => true
    has_many :activity_centers
end

活动中心模式：

class ActivityCenter < ActiveRecord::Base
    validates :activity_center, :presence => true
    validates :department_id, :presence => true
    belongs_to :departments
end

活动中心索引页：

<% @activity_centers.each do |activity_center| %>
    <tr>
      <td><%= activity_center.activity_center %></td>
      <td><%= activity_center.department.department %></td>
      <td style="text-align:right;">
        <%= link_to 'View Activity Center',  activity_center_path(activity_center),      class: "btn btn-success btn-xs" %>
        <%= link_to 'Edit',           edit_activity_center_path(activity_center), class: "btn btn-default btn-xs" %>
        <%= link_to 'Delete',         activity_center_path(activity_center),      class: "btn btn-danger btn-xs",
            method: :delete,
            data: { confirm: 'Confirm you want to delete this activity_center.' } %></td>
    </tr>
  <% end %>

Answer 1

根据MZaragoza的说法，这是一个错字。 belongs_to应该是单数的。