ruby-on-rails - ActiveScaffold - 更改关联对象的默认名称

Question

我的模型 "combobox" has_many "comboboxselects" , 和 "comboboxselects" belongs_to "combobox" . “组合框”的事件支架在组合框选择列中显示数据，如 "#<Comboboxselect:0x472d25c>" .如何显示表“comboxselects”中的“answer”列？

模型:

class Combobox < ActiveRecord::Base
 has_many :comboboxselects
end

class Comboboxselect < ActiveRecord::Base
 belongs_to :combobox
end

架构:

  create_table "comboboxes", :force => true do |t|
   t.string   "question"
   t.datetime "created_at"
   t.datetime "updated_at"
  end

  create_table "comboboxselects", :force => true do |t|
   t.integer  "combobox_id"
   t.string   "answer"
   t.datetime "created_at"
   t.datetime "updated_at"
  end

输出:

class ComboboxesController < ApplicationController
 active_scaffold :combobox do |config|
   config.list.columns = [:id, :question]
   config.columns = [:question, :comboboxselects]
 end
end

class ComboboxselectsController < ApplicationController
 active_scaffold :comboboxselect  do |config|
   config.list.columns = [:id, :combobox, :answer]
   config.columns = [:answer]
 end
end

Answer 1

首先，config.list.columns 中引用的所有字段都必须包含在 config.columns 中(任何显式定义的 config.*.columns 字段必须是 config.columns 的子集)。

然后，在每个还没有名称或标题字段或方法的模型中，您必须声明此自定义方法:

class Comboboxselect < ActiveRecord::Base
 belongs_to :combobox
 def to_label
  "#{answer}" 
 end
end

请参阅 ActiveScaffold 文档:Describing Records: to_label