有没有办法在Laravel中合并2个关系？这是现在的设置方式，但有没有办法可以合并返回？publicfunctionCompetitionsHome(){return$this->HasMany('Competition','home_team_id');}publicfunctionCompetitionsGuest(){return$this->HasMany('Competition','guest_team_id');}publicfunctionCompetitions(){//returnbothCompetitionsHome&CompetitionsGuest}