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如何設置belongs_to:通過(我知道這是無效的)關係?例如:一家公司有很多部門。一個部門有很多團隊。有些團隊是跨職能的,因此他們可以跨越很多部門(habtm)。rails habtm和belongs_to:通過
class Company < ActiveRecord::Base
has_many :departments
has_many :teams, through: :departments
end
class Department < ActiveRecord::Base
belongs_to :company;
has_and_belongs_to_many :teams
end
class Team < ActiveRecord::Base
has_and_belongs_to_many :departments
end
如何從團隊中獲得公司。什麼是這樣做的好方法?第一個應該工作,但我可以或應該試圖在模型中作爲關係來實現它?
class Team < ActiveRecord::Base
has_and_belongs_to_many :departments
def company
departments.first.company
end
end
或
class Team < ActiveRecord::Base
has_and_belongs_to_many: departments
has_one :company, through: departments (<-- is this valid?, seems like this should be has_many but that's not right!)
end
感謝您的確認 – anu