这与我昨天问的关于将更改从 ForeignKey 迁移到 self 到 ManyToManyField 到 self的问题有关,但是因为我暂时只是对应用程序进行原型设计/由于时间限制,我决定放弃相关表并重置迁移历史记录。
这些是相关的模型/领域:
class Person(models.Model):
nominator = models.ManyToManyField('self', symmetrical=False,
verbose_name=_('nominator'), through='Nomination', null=True,
blank=True)
class Nomination(models.Model):
nominee = models.ForeignKey(Person)
nominator = models.ForeignKey(Person)
但是,这甚至不会生成初始迁移:
$ ./manage.py schemamigration nominations --initial
CommandError: One or more models did not validate:
nominations.nomination: Accessor for field 'nominee' clashes with related field 'Person.nomination_set'. Add a related_name argument to the definition for 'nominee'.
nominations.nomination: Accessor for field 'nominator' clashes with related field 'Person.nomination_set'. Add a related_name argument to the definition for 'nominator'.
我按照说明向模型上的and字段添加related_name
参数,如下所示:nominator
nominee
Nomination
class Nomination(models.Model):
nominee = models.ForeignKey(Person, related_name=_('nominator'))
nominator = models.ForeignKey(Person, related_name=_('nominee'))
这给了我一个不同的错误:
$ ./manage.py schemamigration nominations --initial
CommandError: One or more models did not validate:
nominations.nomination: Accessor for field 'nominee' clashes with m2m field 'Person.nominator'. Add a related_name argument to the definition for 'nominee'.
nominations.nomination: Reverse query name for field 'nominee' clashes with m2m field 'Person.nominator'. Add a related_name argument to the definition for 'nominee'.
从这一点开始,我不确定该怎么做。我感觉我忘记了Person
模型中的某些内容,但我不确定那可能是什么,因为 Django/South 文档在涉及到这种关系时都不是很容易接受。