Django模型中的必填字段不是必填项?

我有以下Django模型:

I have the following Django model:

class Customer(models.Model):
    email = models.EmailField(unique=True)

在我的测试用例中，我没有电子邮件就实例化了它.

In my testcase, I instantiate it without an e-mail.

class CustomerTestCase(TestCase):
    def test_that_customer_can_be_created_with_minimum_data(self):
        customer = Customer.objects.create()
        print(customer.__dict__)

我希望它会引发错误，但是它会创建一个带有空字段 email 的记录.如果我明确地说 null = False 和 blank = False ，也会发生同样的事情.相反，它只会打印空的电子邮件.

I expect it to raise an error, but it creates a record with an empty field email. The same thing happens if I explicitly say null=False and blank=False. Instead, it just prints the empty email.

{'email': ''}

我想念什么?