两对象同时映射一对一和一对多

class Kpi::Team < ApplicationRecord
  has_many :crm_teams
  has_many :business_managers, through: :crm_teams, source: :business_manager
  has_many :account_managers, through: :crm_teams, source: :account_manager
  has_many :purchaser_managers, through: :crm_teams, source: :purchaser_manager
  has_many :customer_managers, through: :crm_teams, source: :customer_manager

  belongs_to :business_manager,  class_name: :Manager, foreign_key: :business_manager_id
  belongs_to :account_manager,   class_name: :Manager, foreign_key: :account_manager_id
  belongs_to :purchaser_manager, class_name: :Manager, foreign_key: :purchaser_manager_id
  belongs_to :customer_manager,  class_name: :Manager, foreign_key: :customer_manager_id

  after_save :change_managers

  def change_managers
    if self.saved_change_to_business_manager_id? 
      Kpi::CrmTeam.create(team_id:self.id,manager_type:"BusinessManager",manager_id:self.business_manager_id)
      self.business_manager.update(team_id:[self.id])
    end 
    if self.saved_change_to_account_manager_id?  
      Kpi::CrmTeam.create(team_id:self.id,manager_type:"AccountManager",manager_id:self.account_manager_id) 
      self.account_manager.update(team_id:[self.id])
    end
    if self.saved_change_to_purchaser_manager_id? 
      Kpi::CrmTeam.create(team_id:self.id,manager_type:"PurchaserManager",manager_id:self.purchaser_manager_id) 
      self.purchaser_manager.update(team_id:(self.purchaser_manager.team_id+[self.id]).uniq)
    end
    if self.saved_change_to_customer_manager_id? 
      Kpi::CrmTeam.create(team_id:self.id,manager_type:"CustomerManager",manager_id:self.customer_manager_id) 
      self.customer_manager.update(team_id:(self.customer_manager.team_id+[self.id]).uniq)
    end
  end

end


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class Kpi::CrmTeam < ApplicationRecord
  # 小组角色多肽
  # 记录历史组员
  belongs_to :team, class_name: 'Kpi::Team', optional: true
  belongs_to :manager
  belongs_to :business_manager, foreign_key: :manager_id, optional: true
  belongs_to :account_manager, foreign_key: :manager_id, optional: true
  belongs_to :purchaser_manager, foreign_key: :manager_id, optional: true
  belongs_to :customer_manager, foreign_key: :manager_id, optional: true
end