ruby-on-rails - 无法在 Rails 3 中找到 has_many 的逆关联

Question

我有以下模型:

class Business < ActiveRecord::Base
  has_many :customers, :inverse_of => :business
  has_many :payments, :inverse_of => :business
end

class Customer < ActiveRecord::Base
  belongs_to :business, :inverse_of => :customer
  has_many :payments, :inverse_of => :customer 
end

class Payment < ActiveRecord::Base
  belongs_to :customer, :inverse_of => :payment 
  belongs_to :business, :inverse_of => :payment
end

执行 business.customers 效果很好。但是，当我执行 business.payments 时，出现错误:Could not find the inverse association for business (:payment in Business)。

虽然我不确定为什么。我有两种方式完全相同的关联。我的 schema.db 看起来也不错。这可能是什么问题？

编辑当我删除 has_many :payments 的 inverse_of => :business 时，它起作用了。为什么会这样？这与付款属于客户和企业有关吗(应该无关紧要，对吧？)？

Answer 1

用这个更新支付模型:

class Payment < ActiveRecord::Base
  belongs_to :customer, :inverse_of => :payments 
  belongs_to :business, :inverse_of => :payments
end

你声明了

has_many :payments, :inverse_of => :business 在商业模式中

但是在支付中你使用了belongs_to :business, :inverse_of => :payment

它应该是 belongs_to :business, :inverse_of => :payments