UUIDField有uuid4

Question

沒有屬性這裏是我的模型

from django.contrib.contenttypes.fields import GenericForeignKey 
from django.contrib.contenttypes.models import ContentType 
import uuid 

class PiO(models.Model): 
    uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False) # surrogate 
    person = models.ForeignKey(Person, on_delete=models.PROTECT, max_length=25, blank=True) 
    content_type = models.ForeignKey(ContentType, on_delete=models.PROTECT) # for the various organization types 
    object_id = models.UUIDField(primary_key=False, default=uuid.uuid4, editable=False) # the uuid of the specific org 
    content_object = GenericForeignKey('content_type', 'object_id') 

這是我回溯

AttributeError: 'UUIDField' object has no attribute 'uuid4'. 

注意這是專門引用OBJECT_ID場，不的UUID（PK）字段。作爲一項測試，我評論了object_id字段。我做了而不是因爲沒有object_id字段而得到一個錯誤，並且檢查發生了12行的新錯誤。

我用Google搜索精確短語，並得到

No results found for "AttributeError: 'UUIDField' object has no attribute 'uuid4'". 

我所做的看起來符合the docs給我。

我錯過了什麼？泛型外鍵和/或內容類型的存在與它有什麼關係？

Answer 1

問題是您的型號字段uuid與模塊uuid相沖突。

一種選擇是重命名模型字段，例如：

class PiO(models.Model): 
    id = models.UUIDField(primary_key=True, default=uuid4, editable=False) 
    ... 

另一種選擇是將進口改爲from uuid import uuid4，並更新默認使用uuid4而不是uuid.uuid4。

from uuid import uuid4 

class PiO(models.Model): 
    uuid = models.UUIDField(primary_key=True, default=uuid4, editable=False) # surrogate 
    ... 
    object_id = models.UUIDField(primary_key=False, default=uuid4, editable=False) # the uuid of the specific org