Django DRF 计算字段检查答案

【问题标题】：Django DRF calculated fields checkDjango DRF 计算字段检查
【发布时间】：2020-08-17 19:43:02
【问题描述】：

我想检查从前端到价格表的计算值是否正确。

例如;通过给出销售价格来添加折扣，提前预订折扣降低到 CostPrice。 CostPRice 和 SalesPrice 之间的差异给出了 profiRate。 webFakePrice 通过计算 salesPrice * webFakePriceRate 来计算网络上的虚假价格。我想检查这些 FrontEnd 是否计算正确。我找不到它的关键字。由于一条记录有多条，我应该如何循环？

模型.py

salesPrice = models.FloatField (blank = True, null = True)
costPrice = models.FloatField (blank = True, null = True)
commissionRate = models.FloatField (blank = True, null = True)
discountRate = models.FloatField (blank = True, null = True)
earlyBookingRate = models.FloatField (blank = True, null = True)
totalCommission = models.FloatField (blank = True, null = True)
profitRate = models.FloatField (blank = True, null = True)
webFakePriceRate = models.FloatField (blank = True, null = True)
webFakePrice = models.FloatField (blank = True, null = True)

view.py

def create (self, request, * args, ** kwargs):
    many = True if isinstance (request.data, list) else False
    serializer = PriceSerializer (data = request.data, many = many)
    if serializer.is_valid ():
        serializer.save()
    else:
        return Response (serializer.errors, status = status.HTTP_400_BAD_REQUEST)
    return Response (serializer.data, status = status.HTTP_201_CREATED)

【问题讨论】：

标签： python django django-rest-framework backend calculated-columns

【解决方案1】：

我通过签入序列化程序来做到这一点。

例如：

def age_restriction(dob):
    today = date.today()
    age = today.year - dob.year - ((today.month, today.day) < (dob.month, dob.day))
    if (not(20 < age < 30)):
        raise serializers.ValidationError("You are no eligible for the job")
    return dob
class EligibilitySerializer(serializers.Serializer):
    email = serializers.EmailField()
    name = serializers.CharField(max_length=200)
    date_of_birth = serializers.DateField(validators=[age_restriction])

来源：https://medium.com/@MicroPyramid/custom-validations-for-serializer-fields-django-rest-framework-44feabc1d06b

【讨论】：