When will the "raise_exception=True" pass through the is_valid() function? - django

Question

My Serializer.py
in this MovieSerializer I will check if "name" and "description" is same or not, if same then raise an error.
class MovieSerializer(serializers.Serializer):
id = serializers.IntegerField(read_only=True)
name = serializers.CharField(max_length=80)
description = serializers.CharField(max_length=300)
def create(self, validated_data):
return Movie.objects.create(**validated_data)
def update(self, instance, validated_data):
instance.name = validated_data.get('name', instance.name)
instance.description = validated_data.get('description', instance.description)
instance.save()
return instance
# object level validation
def validate(self, data):
if data['name'] == data['description']:
raise serializers.ValidationError("Name and Description can not be Same.")
else:
return data
My views.py
in serializer.is_valid() not pass raise_exception=True, when 'name' and 'description' is same it return a formated error message. output :
class MovieListAV(APIView):
def post(self, request):
serializer = MovieSerializer(data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data, status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
My another serializer
validate "password" and "confirm_password" same or not, if different then raise an error.
class UserPasswordChangeSerializer(serializers.Serializer):
password = serializers.CharField(write_only=True, style={'input_type':'password'})
confirm_password = serializers.CharField(write_only=True, style={'input_type':'password'})
class Meta:
fields = ['password', 'confirm_password']
def validate(self, attrs):
password = attrs.get('password')
password2 = attrs.get('confirm_password')
if password != password2:
raise serializers.ValidationError({'password':'Password and Confirm Password Should be Same!'})
user = self.context.get('user')
user.set_password(password)
user.save()
return attrs
My other view
serializer.is_valid() not pass raise_exception=True, when "password" and "confirm_password" is dirrerent it can't return any formated error message.
but when I use "raise_exception=True" as a parameter of is_valid() like serializer.is_valid(raise_exception=True) then I got formated error message.
my question is, why this time I need to pass "raise_exception=True" ? but "MovieListAV" class view no need to pass "raise_exception=True" in is_view()
class UserPasswordChange(APIView):
authentication_classes = [JWTAuthentication, ]
permission_classes = [IsAuthenticated, ]
def post(self, request, *agrs, **kwargs):
user = User.objects.get(email=request.user)
serializer = UserPasswordChangeSerializer(data=request.data, context={'user':user})
if serializer.is_valid():
return Response({'success':'Password Change successfull.'}, status=status.HTTP_202_ACCEPTED)
return Response(serializer.errors, status=status.HTTP_304_NOT_MODIFIED)