serializers.py 文件源码

def validate(self, attrs):
        su = super().validate(attrs)
        try:
            longitude = su.get("longitude", self.instance.longitude)
        except AttributeError:
            longitude = None

        try:
            latitude = su.get("latitude", self.instance.latitude)
        except AttributeError:
            latitude = None

        if latitude is not None and (latitude > 90 or latitude < -90):
            raise ValidationError("Latitude must be between -90 and 90")
        if longitude is not None and (longitude > 180 or longitude < -180):
            raise ValidationError("Longitude must be between -180 and 180")
        if (longitude is None and latitude is not None) or (longitude is not None and latitude is None):
            raise ValidationError(
                "If longitude is provided then latitude is required and vice versa. Both can be null.")

        return su