我有两个模型,其中一个与另一个相关。
class Contacts(BaseModel):
user = models.ForeignKey(User, related_name='contacts')
group = models.ForeignKey(ContactGroups, related_name = 'contact_list')
name = models.CharField(_("Name"), max_length = 250, null = True, blank = True)
title = models.CharField(_("Title"), max_length = 250, null = True, blank = True)
twitter = models.CharField(_("Twitter"), max_length = 250, null = True, blank = True)
facebook = models.CharField(_("Facebook"), max_length = 250, null = True, blank = True)
google = models.CharField(_("Google +"), max_length=250, null = True, blank = True)
notes = models.TextField(_("Notes"), null = True, blank = True)
image = ImageField(_('mugshot'), upload_to = upload_to, blank = True, null = True)
class PhoneNumbers(BaseModel):
contact = models.ForeignKey(Contacts, related_name='phone_numbers')
phone = models.CharField(_("Phone"), max_length = 200, null = True, blank = True)
type = models.CharField(_("Type"), max_length = 200, choices = TYPES, null = True, blank = True)
在这里,我希望过滤联系人至少有一个电话号码。
我试过了,
contacts = Contacts.objects.filter(user=request.user, phone_numbers__isnull=True)
是否正确?还有其他优化方法吗?我们如何根据相关名称过滤查询集?
答案 0 :(得分:1)
我想你想要,
contacts = Contacts.objects.filter(user=request.user, phone_numbers__isnull=False)
即检查False
而不是True
,因为您需要Contacts
,其中至少有一个PhoneNumber
。如果不存在,则为NULL
。