Problem on calling save() for post in django rest framework - django

Question

Calling save() on a serializer is returning below error:
Original exception was:
Traceback (most recent call last):
File "C:\Users\aditya\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\rest_framework\serializers.py", line 940, in create
instance = ModelClass.objects.create(**validated_data)
File "C:\Users\aditya\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\aditya\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\query.py", line 417, in create
obj.save(force_insert=True, using=self.db)
TypeError: save() got an unexpected keyword argument 'force_insert'
views.py
def post(self,request):
if request.method=='POST':
serializer = invoiceSerializers(data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data, status=status.HTTP_201_CREATED)
else:
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
model.py
class invoice(models.Model):
customer = models.CharField(max_length=256, blank=False)
date = models.DateField(default=now)
invoice_number = models.IntegerField(editable=False,default=1)
total_quantity = models.DecimalField(max_digits=10, decimal_places=2)
total_amount = models.DecimalField(max_digits=10, decimal_places=2)
total_tax = models.DecimalField(max_digits=10, decimal_places=2)
def save(self):
if self._state.adding:
last_invoice=invoice.objects.all().aggregate(largest=models.Max('invoice_number'))['largest']
if last_invoice is not None:
self.invoice_number=last_invoice+1
super(invoice,self).save()
I am not able to understand why this is happening and how to fix this. Any help is appreciated.

Answer 1

The save() method of Model accepts few keyword arguments such as force_insert,using etc. But, you are not accepting those arguments in your override methods.
So change your save() method as
class invoice(models.Model):
.....
.....
.....
# your code
def save(self, *args, **kwargs):
.....
.....
.....
# your code
super(invoice, self).save(*args, **kwargs)