Question

我有以下型号：

class Merchant(BaseModel):
    user = OneToOneField(settings.AUTH_USER_MODEL, related_name='merchant', primary_key=True)

class MerchantExtended(BaseModel):
    merchant = OneToOneField(Merchant, related_name='extended', primary_key=True)
    billing_address = TextField()

在保存包含Merchant和MerchantExtended数据的表单时，我希望能够这样做：

user = get_user_from_somewhere()
merchant = Merchant(user=user)

# Implicitly does get_or_create() and sets merchant.extended.merchant
merchant.extended.billing_address = '123 Main St'

# Implicitly does merchant.extended.save()
merchant.save()

以上内容是否已存在，或者是否需要覆盖某些模型属性/方法才能实现此目的？

Answer 1

我认为Django的update_or_create可以在这里使用：

merchant = Merchant.objects.get(user=request.user)
ext_merchant, created = MerchantExtended.objects.update_or_create(
    merchant=merchant, defaults={'billing_address': '123 Main St'}
)

Django相关模型，如果不存在则创建？

1 个答案: