如何扩展Django Group模型？

如何扩展Django Group模型？

您可以创建一个对Group进行子类化的模型，添加自己的字段，并使用模型管理器返回所需的任何自定义查询集。这是一个截短的示例，显示了我如何扩展“组”以表示与学校关联的家庭：

from django.contrib.auth.models import Group, Userclass FamilyManager(models.Manager):    """    Lets us do querysets limited to families that have     currently enrolled students, e.g.:        Family.has_students.all()     """    def get_query_set(self):        return super(FamilyManager, self).get_query_set().filter(student__enrolled=True).distinct()class Family(Group):    notes = models.TextField(blank=True)    # Two managers for this model - the first is default     # (so all families appear in the admin).    # The second is only invoked when we call     # Family.has_students.all()      objects = models.Manager()    has_students = FamilyManager()    class meta:        verbose_name_plural = "Families"        ordering = ['name']    def __unipre__(self):        return self.name