class orderdetails(models.Model):
product = models.CharField(max_length=100,default='')
quantity = models.IntegerField()
unit_price = models.IntegerField()
total= ()
CodePudding user response:
You can create a total
method in your model and use it in your view (or wherever you want). Your model will look like this:
class OrderDetails(models.Model):
product = models.CharField(max_length=100,default='')
quantity = models.IntegerField()
unit_price = models.IntegerField()
def total(self):
return self.quantity * self.unit_price
Then you can use it like OrderDetailsObject.total()
.
CodePudding user response:
For calculations, you may perform it in you your view.py
, for example:
def my_function(request):
if request.POST:
......
......
my_product = OrderDetails(product=my_product, quantity=my_quantity, unit_price=my_unit_price, total=my_quantity * my_unit_price)
my_product.save()
Alternatively, you may perform it as well while saving your model as follows:
class OrderDetails(Model.models):
product = models.CharField(max_length=100,default='')
quantity = models.IntegerField()
unit_price = models.IntegerField()
total= models.CharField(max_length=30)
def get_total(self):
result = self.quantity * self.unit_price
return result
def save(self, *args, **kwargs):
self.total = self.get_total()
super(OrderDetails, self).save(*args, **kwargs)
For serializer, you may perform the following:
from rest_framework import serializers
from .model import OrderDetails
class OrderDetailsSerializer(serializers.ModelSerializer):
class Meta:
model = OrderDetails
fields = "__all__"
def create(self, validated_data):
order = OrderDetails(**validated_data)
order.total = order.quantity * order.unit_price
order.save()
return order
and this is how to use the OrderDetailsSerializer
in your view.py
:
from rest_framework import status
from rest_framework.decorators import api_view
from rest_framework.response import Response
from .model import OrderDetails
@api_view(['POST', 'GET'])
def order_details(request, format=None):
if request.method == 'GET':
orders = OrderDetails.objects.all()
serializer = OrderDetailsSerializer(orders, many=True)
return Response(serializer.data)
elif request.method == 'POST':
serializer = OrderDetailsSerializer(data=request.data)
if serializer.is_valid():
serializer.save()
return Response("success", status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)