Django Rest框架会自动处理哪些类型的验证?
假设我有一个定义如下的模型:Django Rest框架会自动处理哪些类型的验证?,django,django-rest-framework,django-serializer,Django,Django Rest Framework,Django Serializer,假设我有一个定义如下的模型: from django.core.validators import MinValueValidator, MaxValueValidator, RegexValidator alphanumeric_validator = RegexValidator(r'^[a-zA-Z0-9]*$', 'Only alphanumeric characters are allowed.') class Person(model.Model): name = mod
from django.core.validators import MinValueValidator, MaxValueValidator, RegexValidator
alphanumeric_validator = RegexValidator(r'^[a-zA-Z0-9]*$', 'Only alphanumeric characters are allowed.')
class Person(model.Model):
name = models.CharField(max_length=60, validators=[alphanumeric_validator])
number = models.IntegerField(validators=[MinValueValidator(0), MaxValueValidator(100)])
email = models.EmailField()
现在,假设我正在使用Django Rest框架序列化和创建Person对象。它看起来像这样:
from rest_framework import serializers
from .models import Person
from rest_framework.response import Response
class PersonSerializer(serializers.ModelSerializer):
class Meta:
model = Person
fields = ('name', 'number', 'email')
class PostPerson(APIView):
def post(self, request, format=None):
serializer = PersonSerializer(data=request.data)
if serializer.is_valid():
serializer.save()=
return Response(serializer.data, status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
现在,我的问题是:当我使用is\u valid()
验证序列化程序时,DRF是否处理验证器=[字母数字验证器]
,以及验证器=[MinValueValidator(0),MaxValueValidator(100)]
?此外,我确信DRF会自动处理max_length
属性,但它是否也会使用适当的正则表达式检查电子邮件是否为实际电子邮件地址
我通常只是对clean、full_clean以及表单验证和序列化程序验证期间调用的所有方法感到困惑,因此希望得到一些可靠的解释
提前感谢。Django rest框架验证的行为类似于DjangoModelForm
验证;它从模型字段中获取参数并进行相应的验证
例如,我们将使用一个简单的模型&serializer类,它有一个具有唯一性约束的字段
class CustomerReportRecord(models.Model):
time_raised = models.DateTimeField(default=timezone.now, editable=False)
reference = models.CharField(unique=True, max_length=20)
class CustomerReportSerializer(serializers.ModelSerializer):
class Meta:
model = CustomerReportRecord
当我们打开Django shell时,我们可以看到验证器已经应用于序列化程序(注意max_length
和验证器
列表)
我们可以在这里看到,序列化程序调用字段。运行\u validation
方法,该方法使用模型字段验证器,如果验证失败,它们将引发djangovalidateError
。如果成功,它将继续运行现有的任何其他验证器,例如序列化程序字段特定验证器(.validate\uu
)
请阅读更多关于验证的信息以及它在Django&DRF中的工作原理:
希望这有助于理解验证在DRF中是如何工作的,哪怕只是一点点
编辑:只要您存储电子邮件的字段在您的模型中定义为EmailField
,DRF就会验证电子邮件。更多关于这方面的信息可以找到
>>> from project.example.serializers import CustomerReportSerializer
>>> serializer = CustomerReportSerializer()
>>> print(repr(serializer))
CustomerReportSerializer():
id = IntegerField(label='ID', read_only=True)
time_raised = DateTimeField(read_only=True)
reference = CharField(max_length=20, validators=[<UniqueValidator(queryset=CustomerReportRecord.objects.all())>])
def to_internal_value(self, data):
"""
Dict of native values <- Dict of primitive datatypes.
"""
if not isinstance(data, dict):
message = self.error_messages['invalid'].format(
datatype=type(data).__name__
)
raise ValidationError({
api_settings.NON_FIELD_ERRORS_KEY: [message]
})
ret = OrderedDict()
errors = OrderedDict()
fields = self._writable_fields
for field in fields:
validate_method = getattr(self, 'validate_' + field.field_name, None)
primitive_value = field.get_value(data)
try:
validated_value = field.run_validation(primitive_value)
if validate_method is not None:
validated_value = validate_method(validated_value)
except ValidationError as exc:
errors[field.field_name] = exc.detail
except DjangoValidationError as exc:
errors[field.field_name] = list(exc.messages)
except SkipField:
pass
else:
set_value(ret, field.source_attrs, validated_value)
if errors:
raise ValidationError(errors)
return ret