考虑以下Django模型:
class GeneralJournal(models.Model):
pass
class Journal(models.Model):
general_journal = models.ForeignKey(GeneralJournal)
class Account(models.Model):
general_journal = models.ForeignKey(GeneralJournal)
journals = models.ManyToManyField(Journal)
强制执行Account.journals
关系仅接受Journal.general_journal
与Account.general_journal
相同的期刊的最佳方法是什么?