我的帐户模型如下（简化）：
class Account < ActiveRecord::Base
attr_accessible :account_number, :display_name, :master_account_id
has_many :child_accounts, :class_name => "Account", :foreign_key => "id"
belongs_to :master_account, :class_name => "Account", :foreign_key => "master_account_id"
end
@account.master_account目前工作正常，但我也希望能够访问@account.child_accounts- 我需要做什么才能解决这个问题？
我认为事情必须反过来：
class Account < ActiveRecord::Base
has_many :child_accounts, :class_name => "Account", :foreign_key => "master_account_id"
belongs_to :master_account, :class_name => "Account"
end
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