Python Django模型保存问题

我将在这里澄清我的情况。 我有一些模型：

class Messages(models.Model):
    message_idnr = models.BigIntegerField(primary_key=True)
    mailbox_idnr = models.ForeignKey(Mailboxes, null=True, db_column='mailbox_idnr', blank=True)
    physmessage = models.ForeignKey(Physmessage, null=True, blank=True)

    def __unicode__(self):
        return '%s'%(self.physmessage)
    class Meta:
        db_table = u'messages'


class Mailboxes(models.Model):
    mailbox_idnr = models.BigIntegerField(primary_key=True)
    owner_idnr = models.ForeignKey(Users, null=True, db_column='owner_idnr', blank=True)
    name = models.CharField(max_length=255)
    permission = models.SmallIntegerField(default =2)
    seq = models.BigIntegerField(default = 0)
    class Meta:
        db_table = u'mailboxes'


class Users(models.Model):
    user_idnr = models.BigIntegerField(primary_key=True)
    userid = models.CharField(max_length=100, unique=True)
    passwd = models.CharField(max_length=130)
    last_login = models.DateTimeField()
    def __unicode__(self):
        return '%s'%(self.userid)

    class Meta:
        db_table = u'users'

class Physmessage(models.Model):
    id = models.BigIntegerField(primary_key=True)
    messagesize = models.BigIntegerField()
    rfcsize = models.BigIntegerField()
    internal_date = models.DateTimeField(null=True, blank=True)
    def __unicode__(self):
        return '%s'%(self.id)
    class Meta:
        db_table = u'physmessage'

然后，我有一个views.py调用这个函数

def dbmail_move_email_to_dir(mailbox,maildir,mailvalue,destination):
    db_user = Users.objects.get(userid = mailbox.email)
    if maildir.lower() == 'inbox':
        db_source_dir = Mailboxes.objects.get(Q(owner_idnr = db_user),Q(name = 'INBOX'))
    else:
        db_source_dir = Mailboxes.objects.get(Q(owner_idnr = db_user),Q(name = 'INBOX.%s'%maildir))
    db_des_dir = Mailboxes.objects.get(Q(owner_idnr = db_user),Q(name = 'INBOX.%s'%destination))
    for value in mailvalue:
        print 'physical value of email %s'%value
        print 'from maildir id %s'%db_source_dir.mailbox_idnr
        print 'to maildir id %s'%db_des_dir.mailbox_idnr
        print Physmessage.objects.get(id = value)
        print len(Messages.objects.filter(physmessage = Physmessage.objects.get(id = value)))
        for row in Messages.objects.filter(physmessage = Physmessage.objects.get(id = value)):
            print 'delete each row %s'%row
            print 'current mailbox %s'%row.mailbox_idnr.mailbox_idnr
            row.mailbox_idnr=db_des_dir
            print 'current mailbox %s'%row.mailbox_idnr.mailbox_idnr
            row.save()
            print 'current mailbox %s'%row.mailbox_idnr.mailbox_idnr

    return True

当我从测试文件运行这个函数时，我得到如下结果

physical value of email 15
from maildir id 128
to maildir id 126
15
1
delete each row 15
current mailbox 128
current mailbox 126
current mailbox 126

它会将邮箱_idnr更改为新值，我会在postgres数据库中看到它。但当我在视图中调用此函数时，登录打印是相同的，但邮箱idnr没有更改

physical value of email 46
from maildir id 125
to maildir id 128
46
1
delete each row 46
current mailbox 125
current mailbox 128
current mailbox 128

希望每个人都能建议修复它。我有登录管理员，也可以更改它。但在我看来，我不能改变它。也不能删除它

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谢谢，

请添加您的MyModel定义和您看到的输出。这将有助于了解情况。如何检查“数据库中的数据未更改”？