我要在项目的总价中添加交货成本,但是它不起作用。这两个字段均为Decimal
,但会引发此错误InvalidOperation at /orders/ [<class 'decimal.ConversionSyntax'>]
。这是交货价格模型
跟踪
File "/home//venv/lib/python3.7/site-packages/rest_framework/fields.py", line 1115, in to_representation
value = decimal.Decimal(str(value).strip())
decimal.InvalidOperation: [<class 'decimal.ConversionSyntax'>]
models.py
class DeliveryPrice(models.Model):
shipping_name = models.CharField(max_length=255, blank=True, null=True)
shipping_charge = models.DecimalField(max_digits=10, decimal_places=2, blank=True, null=True)
它是FK
至Order
模型。
serializers.py
class OrderSerializer(serializers.ModelSerializer):
price_of_delivery = serializers.DecimalField(max_digits=10, decimal_places=2)
class Meta:
model = Order
fields = ['phone', 'address', 'price_of_delivery']
def create(self, validated_data):
price_of_delivery = validated_data.pop('price_of_delivery')
price_instance, created = DeliveryPrice.objects.get_or_create(shipping_charge=price_of_delivery)
order_instance = Order.objects.create(**validated_data, price_of_delivery=price_instance)
return order_instance
views.py
total_aggregated_dict = cart.aggregate(
total_price=Sum(F('quantity') * F('product__price'), output_field=DecimalField()))
print(total_aggregated_dict)
order_total = total_aggregated_dict['total_price']
delivery_price = self.request.data['price_of_delivery']
print(delivery_price)
final_total = Decimal(order_total) + Decimal(delivery_price)
print(final_total)
order = serializer.save(user=user, total_price=final_total)
这是我到目前为止所尝试的全部。为了清楚起见,首先,用户将产品添加到购物车,然后他们可以在填写订单字段(地址,电话号码等)时进行订购,他们还选择了运输成本,并且此选定的运输成本应添加到总价中。但就我而言,它无法正常工作,但出现上述错误。我该如何解决这个问题?有什么帮助吗?提前致谢!
答案 0 :(得分:0)
已解决
我的错误与序列化程序有关,因为我将price_of_delivery
设置为DecimalField
,并且在视图中我也转换为Decimal
。我刚刚将serializers.DecimalField
更改为serializers.CharField
,并且一切正常。