django rest框架中的验证

Question

我正在尝试验证 django rest 框架中的现有记录并遵循link

在我的序列化程序类中，我有我的类。

from django.forms import widgets
from rest_framework import serializers
from models import Part

class PartSerializer(serializers.Serializer):

    part_id = serializers.CharField(required=True, validators=[UniqueValidator(queryset=Part.objects.all())] )
    capacity = serializers.IntegerField(required=True)
    price = serializers.IntegerField(required=True)


    def create(self, validated_data):

        """
        Create and return a new `Part` instance, given the validated data.
        """
      #  try:part_exist = Part.objects.get(part_id = validated_data['part_id'])
      #  except:part_exist = None
      #  if part_exist:
      #      raise  serializers.ValidationError('Part name already exist.')
      #  else:
        return Part.objects.create(**validated_data)

但我总是收到错误name 'UniqueValidator' is not defined

我不知道如何导入它，因为文档中没有提到它。请帮助我如何做到这一点。如果不可能，我应该在视图下编写自己的验证逻辑吗？

谢谢

Answer 1

您应该从rest_framework.validators 模块导入UniqueValidator：

from rest_framework.validators import UniqueValidator