Ralis Multiple foreign_key

Question

我在has_many上组合多个外键时遇到了问题。我明白，这不是has_many上foreign_key的明确意图。但无论我在寻找一种简单的方法来组合两个外键。

我试着将两个的has_many的，像这样：

has_many :primary_clients, foreign_key: :coach_id, inverse_of: :coach do 
end 

has_many :secondary_clients, foreign_key: :coach_two_id, inverse_of: :coach do 
end 

def clients 
    Client.where("primary_clients = ? OR secondary_clients = ?", self.id, self.id) 
end 

而且我也试过unscope重新定义范围：

has_many :clients, ->(user) { unscope(:where).where("coach_id = :id OR coach_two_id = :id", id: ids) }, inverse_of: :coach do 
end 

我喜欢的东西很简单，像后是：

has_many :clients, foreign_key: {:coach_id, :coach_two_id}, inverse_of: :coach do 
end 

任何意见，以正确的方向指向我？

Answer 1

一个非常小集合，你可以只是做

primary_clients | secondary_clients与union操作|