我无法更新余额金额，当我尝试保存该值时，它会引发该错误。
模型.py,
class balance_data(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
total_amount = models.FloatField(max_length=15)
def __str__(self):
return str(self.user)
视图.py,
def cash_in(request, amount):
new_amount = request.user.balance_data.total_amount + amount
balance_data.total_amount = new_amount
balance_data.save()
return HttpResponse(request.user.balance_data.total_amount)
我该如何解决这个问题？
我期待更新金额。
def cash_in(request, amount):
# user whose total_amount is to be updated.
user = request.user
# get current user instance of balance_data
user_current_balance = balance_data.objects.get(user=user)
# update total_amount by adding amount to its total_amount
user_current_balance.total_amount = user_current_balance.total_amount + amount
# save changes to database
user_current_balance.save()
return HttpResponse(user_current_balance.total_amount)
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我来说两句