Question

我正在尝试将一个布尔属性（third_party）添加到当前只显示名称的当前collection_select中：

<div class='form-group'>
  <%= f.label :project_component_id, class: "form-label" %>
  <%= f.collection_select :project_component_id, issue.project.project_components.order("LOWER(name)"), :id, :name, {include_blank:true}, class: "form-control input-sm" %>
</div>

我如何追加third_party以便每个选择选项显示为＆＃34; name（third_party）＆＃34;？

谢谢！

Answer 1

您可以在模型中创建一个实例方法，使用额外的文本插入所需的属性，并将其作为第四个选项传递给collection_select帮助器：

我假设名为ProjectComponent，所以：

class ProjectComponent < ApplicationRecord

def name_with_thirdparty
  "#{name}(#{third_party})"
end

所以在你看来：

<%= f.collection_select(
      :project_component_id, 
      issue.project.project_components.order("LOWER(name)"),
      :id,
      :name_with_thirdparty,
      { include_blank: true },
      class: 'form-control input-sm') %>

如何将另一个属性附加到collection_select？

1 个答案: