如何在django-rest-framework中得到数据库验证错误后返回状态码？

from rest_framework import serializers, status
from rest_framework.views import APIView
from rest_framework.response import Response

class MySerializer(serializers.Serializer):
    username = serializers.CharField()
    password = serializers.CharField()

    def validate(self, data):
        # 自定义验证逻辑
        username = data.get('username')
        password = data.get('password')

        if len(password) < 8:
            raise serializers.ValidationError('密码长度不能少于8个字符')

        # 其他验证逻辑...

        return data

class MyView(APIView):
    def post(self, request):
        serializer = MySerializer(data=request.data)
        if serializer.is_valid():
            # 处理验证通过的逻辑
            return Response({'message': '验证通过'})
        else:
            # 处理验证失败的逻辑
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)