models.py 文件源码

def get_user(cls, user):
        """Get user object:
        1º check if user is already User, LocalProxy, or AnnonymousUser object
            if so, just return it
        2º if not, search for this user and return if found.
        3º otherwise, return DoesNotExists exception"""
        if any([isinstance(user, obj) for obj in [UserMixin,
                                                  AnonymousUserMixin]]):
            return user
        if isinstance(user, LocalProxy):
            return user._get_current_object()
        try:
            return User.objects.get(username=user)
        except (me.DoesNotExist, me.ValidationError):
            return User.objects.get(id=user)