Rail3到Rails 4;改变条件到哪里

Question

升级到Rail4时，我将条件更改为模型中的位置，但我现在收到语法错误（语法错误，意外＆＃39;}＆＃39;，期待关键字_end）

has_many :businesses, through: :business_admins, { where business_admins: { state: 'accepted'} }

Answer 1

将其更改为：

has_many :businesses, 
  -> { where(business_admins: { state: 'accepted'}) }, 
  through: :business_admins

另见Rails documentation。