Django get_or_create，如何说commit=False

Suppose I have this model:

假设我有这个模型:

class SocialGroupMembers(models.Model):
    social_group = models.ForeignKey(SocialGroup, related_name="members")
    profile = models.ForeignKey(Profile)
    date_joined = models.DateTimeField(auto_now_add=True)
    added_by = models.ForeignKey(User)
    approved = models.BooleanField(default=False)
class