你可以创建一个对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。这是一个截断的示例，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, User
class 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 __unicode__(self):
return self.name
如果仅对Group对象进行子类化，则默认情况下它将创建一个新的数据库表，并且管理站点将不会选择任何新字段。
你需要向现有组中注入新字段：
if not hasattr(Group, 'parent'):
field = models.ForeignKey(Group, blank=True, null=True, related_name='children')
field.contribute_to_class(Group, 'parent')
class MyGroup(Group):
class Meta:
proxy = True
def myFunction(self):
return True
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