Tag: 轨道型号

Rails – 模型疑问

鉴于我有这样的模型： class Person has_many :owned_groups, :class_name => “Group”, :foreign_key => :owner_id has_many :owned_group_memberships, :through => :owned_groups, :source => :group_memberships has_many :group_memberships, :foreign_key => “member_id” has_many :groups, :through => :group_memberships end class GroupMembership belongs_to :member, :class_name => ‘Person’ belongs_to :group end class Group belongs_to :owner, :class_name => “Person” has_many :group_memberships has_many :members, :through => :group_memberships end […]