Hi everyone,
I'm trying to customize the a field validation + it's validation error
message, as I have the following code:
VIEW:
class MyClassViewSet(viewsets.ModelViewSet):
serializer_class = MySerializer
queryset = mymodel.objects.all()
def perform_create(self, serializer):
serializer.save()
@method_decorator(csrf_protect)
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.data)
serializer.is_valid(raise_exception=True)
self.perform_create(serializer)
headers = self.get_success_headers(serializer.data)
return Response(serializer.data, status=status.HTTP_201_CREATED,
headers=headers)
SERIALIZER:
class MySerializer(serializers.ModelSerializer):
class Meta:
model = mymodel
fields = ['id', 'name', 'email', 'note', 'isdisabled']
def __init__(self, *args, **kwargs):
super(MySerializer, self).__init__(*args, **kwargs)
validators = self.fields['email'].validators
for validator in validators:
if isinstance(validator, EmailValidator):
validator.message = _("msgInvalidEmail")
MODEL:
class mymodel(models.Model):
name = models.CharField(max_length=100, null=False, default=None,
db_column='name')
email = models.EmailField(max_length=254, unique=False, blank=True,
null=True, db_column='email')
note = models.CharField(max_length=500, null=True, blank=True,
default=None, db_column='note')
licensekey = models.CharField(max_length=100, null=True,
db_column='licensekey')
isdisabled = models.BooleanField(null=False, default=False,
db_column='isdisabled')
Problem 1:
If I run the code like this, I get a generic error message like this, "This
field may not be blank.", when I don't enter name for example.
I don't know which field the message is talking about.
If I add a validation into my serializer as follow:
def validate_name(self, value):
if not value:
raise serializers.ValidationError(_("msgInvalidName"))
def validate_licensekey(self, value):
if not value:
raise serializers.ValidationError(_("msgInvalidLicenseKey"))
The validation method don't get triggered.
Only if change my model adding "blank=True" for these fields in my model.
Problem 2:
If I add the field validation in my serializer and change the mode adding
"blank=True" I start getting some weird behaviour when running my unit
tests.
Problem 3:
How can I check if the serializer error message already have an error
message and add the "Carriage return + Line feed" to push the next
validation error message to the next line?
Is there a better way to customize those validation error messages without
changing the model attributes?
What would a good practice in this case?
Any help would be greatly appreciated.
Thank you!
Regards,
Alex
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