如何在 Django REST 中使用验证器方法验证模型字段？

Question

I want to validate email while saving an object through API. I'm using model validate but it's not working while saving Invitation object through API, It's working only when we creating objects through the admin panel.

models.py

def validate_email(value): 
    if "@gmail.com" in value: 
        return value 
    else: 
        raise ValidationError("This field accepts mail id of google only") 


class Invitation(models.Model):
    email = models.EmailField(validators=[validate_email])

Answer 1

The Django documentation says:

Note that validators will not be run automatically when you save a model, but if you are using a ModelForm, it will run your validators on any fields that are included in your form

and the DRF docs says:

With REST framework the validation is performed entirely on the serializer class

Which means in order to validate a model instance creation via api, you will need to define all validations in the Serializer class tself.

Answer 2

尝试通过Model.clean()对其进行验证

Answer 3

Note that validators will not be run automatically when you save a model, but if you are using a ModelForm, it will run your validators on any fields that are included in your form.

Use serializers to validate model properties. https://www.django-rest-framework.org/api-guide/serializers/#validation

serializers.py

from rest_framework import serializers
class Invitation(serializers.Serializer):
    email = models.EmailField()


    def validate_email(self, value):
        if "@gmail.com" in value: 
            return value 
        else: 
            raise ValidationError("This field accepts mail id of google only")