Rails在索引中显示字符串不是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。我试图显示部门字符串（:department）而不是部门ID。我试过@activity_center.department.department但这不起作用。有什么建议么？

形式：

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

系车型：

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

活动中心型号：

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

每MZaragoza这是一个错字。 belongs_to应该是单数。