유효성검사

유효성검사 4가지 방법

• Field Level
• Object Level
• Validator
• 옵션주기
  
  

Field Level Validator

• 필드 단위의 유효성검사가 필요할때,
• validate_<필드명> 함수를 정의해준다.

class MovieSerializer(serializers.Serializer):
    id = serializers.IntegerField(read_only=True)
    name = serializers.CharField()
    description = serializers.CharField()
    active = serializers.BooleanField()

    def create(self, validated_data):
        return Movie.objects.create(**validated_data)


    # Field-Level Validation
    def validate_name(self, value):

        if len(value) < 2:
            raise serializers.ValidationError('Name is too short!!')
        else:
            return value

Object Level Validator

• 객체 수준에서의 유효성 검사가 필요할때,

class MovieSerializer(serializers.Serializer):
    id = serializers.IntegerField(read_only=True)
    name = serializers.CharField(min_length=2)
    description = serializers.CharField()
    active = serializers.BooleanField()

    # Object-Level Validation
    def validate(self, data):
        if data['title'] == data['description']:
            raise serializers.ValidationError(
                'Title and Description should be different')
        else:
            return data

Validator

• 유효성검사기를 따로 만들기

def name_length(value):
    if len(value) < 2:
        raise serializers.ValidationError("Name is too short!")


class MovieSerializer(serializers.Serializer):
    id = serializers.IntegerField(read_only=True)
    name = serializers.CharField(validators=[name_length])
    description = serializers.CharField()
    active = serializers.BooleanField()

옵션주기

• min_length 파라미터 주기

class MovieSerializer(serializers.Serializer):
    id = serializers.IntegerField(read_only=True)
    name = serializers.CharField(min_length=10)
    description = serializers.CharField()
    active = serializers.BooleanField()