[英]How to I pass values into dependent models with Factory Boy in Django?
我正在開發一個開源 django 網絡應用程序,我希望使用 Factory Boy 來幫助我為一些測試設置模型,但是在閱讀文檔和查看示例幾個小時后,我認為我需要接受失敗並在這里問。
我有一個客戶模型,它看起來有點像這樣:
class Customer(models.Model):
def save(self, *args, **kwargs):
if not self.full_name:
raise ValidationError('The full_name field is required')
super(Customer, self).save(*args, **kwargs)
user = models.OneToOneField(
settings.AUTH_USER_MODEL,
on_delete=models.SET_NULL,
related_name='customer',
null=True
)
created = models.DateTimeField()
created_in_billing_week = models.CharField(max_length=9)
full_name = models.CharField(max_length=255)
nickname = models.CharField(max_length=30)
mobile = models.CharField(max_length=30, default='', blank=True)
gocardless_current_mandate = models.OneToOneField(
BillingGoCardlessMandate,
on_delete=models.SET_NULL,
related_name='in_use_for_customer',
null=True,
)
我也在使用來自 django.contrib.auth 的標准 Django 用戶模型。
這是我的工廠代碼:
class UserFactory(DjangoModelFactory):
class Meta:
model = get_user_model()
class CustomerFactory(DjangoModelFactory):
class Meta:
model = models.Customer
full_name = fake.name()
nickname = factory.LazyAttribute(lambda obj: obj.full_name.split(' ')[0])
created = factory.LazyFunction(timezone.now)
created_in_billing_week = factory.LazyAttribute(lambda obj: str(get_billing_week(obj.created)))
mobile = fake.phone_number()
user = factory.SubFactory(UserFactory, username=nickname,
email="{}@example.com".format(nickname))
就我而言,我希望能夠產生這樣的客戶
CustomerFactory(fullname="Joe Bloggs")
並生成相應的用戶,使用正確的用戶名和電子郵件地址。
現在,我收到此錯誤:
AttributeError: The parameter full_name is unknown. Evaluated attributes are {'email': '<factory.declarations.LazyAttribute object at 0x111d999e8>@example.com'}, definitions are {'email': '<factory.declarations.LazyAttribute object at 0x111d999e8>@example.com', 'username': <DeclarationWrapper for <factory.declarations.LazyAttribute object at 0x111d999e8>>}.
我認為這是因為我依賴於客戶中的惰性屬性,在創建用戶工廠之前不會調用該屬性。
如果我希望能夠使用工廠來創建 Customer 模型實例,以及如上所述的相應用戶,我應該怎么做?
對於完整模型的價值,可以在 github repo 上看到這里
在這種情況下,最好的方法是從客戶聲明中選擇值:
class CustomerFactory(DjangoModelFactory):
class Meta:
model = models.Customer
full_name = factory.Faker('name')
nickname = factory.LazyAttribute(lambda obj: obj.full_name.split(' ')[0])
created = factory.LazyFunction(timezone.now)
created_in_billing_week = factory.LazyAttribute(lambda obj: str(get_billing_week(obj.created)))
mobile = factory.Faker('phone_number')
user = factory.SubFactory(
UserFactory,
username=factory.SelfAttribute('..nickname'),
email=factory.LazyAttribute(lambda u: "{}@example.com".format(u.username)))
)
此外,使用factory.Faker('field_name')
為每個實例獲取隨機值:類聲明中的fullname = fake.name()
行等效於:
DEFAULT_FULL_NAME = fake.name()
class CustomerFactory(DjangoModelFactory):
full_name = DEFAULT_FULL_NAME
class Meta:
model = models.customer
而factory.Faker('name')
相當於:
class CustomerFactory(DjangoModelFactory):
full_name = factory.LazyFunction(fake.name)
class Meta:
model = models.customer
即fake.name()
將為使用此工廠構建的每個模型提供不同的名稱。
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