1,在字段上定制字段信息的判断

class CreateManagerSerializers(serializers.ModelSerializer):    username = serializers.CharField(validators=[UniqueValidator(        queryset=models.Manager.objects.all(),        message='名称重复'    )])    password = serializers.CharField(write_only=True) ==>在传入库里面已经有的名字时,显示错误信息

{

"username": [

"名称重复"

]

}

2,在Meta中定制错误信息,效果和字段上定制一样

class Meta:     model = models.Manager     fields = ['username', 'password', 'email', 'mobile_number', 'role_num', 'channel']     extra_kwargs = {
           'username':{'validators':[UniqueValidator(             queryset=models.Manager.objects.all(),             message='名称重复')]},         'email': {'validators': [UniqueValidator(             queryset=models.Manager.objects.all(),             message='email重复')]},     }

==>错误信息和上面一样

{

"username": [

"名称重复"

],

"email": [

"email重复"

]

}

3,利用valition_字段 raise报错信息

class CreateManagerSerializers(serializers.ModelSerializer):    username = serializers.CharField()    password = serializers.CharField(write_only=True)        def validate_username(self,value):        from rest_framework.exceptions import ValidationError        flag=models.Manager.objects.filter(username=value).exists()        if flag:            raise ValidationError('用户名称重复')        return value ==>报错信息

{

"username": [

"用户名称重复"

],

"email": [

"email重复"

]

}