ruby-on-rails - Rails Active Admin 多对多关系

Question

我有以下型号

class Owner < ActiveRecord::Base
  has_many :business_owners
  has_many :businesses, :through => :business_owner
end

class Business < Active Record::Base
  has_many :business_owners
  has_many :businesses, :through => :business_owner
end

class BusinessOwner < ActiveRecord::Base
  belongs_to :owners
  belongs_to :businesses
end

我已尝试将 BusinessOwner 模型添加到管理仪表板:

rails generate active_admin:resource BusinessOwner

它在 app/admin/中创建一个名为 business_owners 的文件当我尝试查看企业主时，我收到以下错误:

uninitialized constant BusinessOwner::Owners
Extracted source (around line #1):

1: render renderer_for(:index)

谁能告诉我如何在多对多关系中使用 active admin？

Answer 1

你的人际关系看起来不对。

在 belongs_to 关系中，Rails 希望您使用单数形式

class BusinessOwner < ActiveRecord::Base
  belongs_to :owner
  belongs_to :business
end

同样，您需要正确引用:through

  has_many :businesses, :through => :business_owners

(即复数所有者)

通常值得在考虑 ActiveAdmin 之前启动 Rails 控制台(或编写测试，呵呵)来测试这些东西；)