Python Django流动余额/累计余额

我有一个带有计算余额（运行余额/累积余额）函数的事务模型，但余额输出作为查询集返回

如何修正我的函数，使余额只显示数字，10月16日为-9.00，10月18日为-16.00，然后10月20日为-21.00。先谢谢你

model.py

class Transaction(models.Model):
    transaction_date = models.DateField()
    account_nickname = models.ForeignKey(Accounts, on_delete=models.CASCADE)
    amount = models.FloatField()

    @property
    def balance(self):
        return Transaction.objects.annotate(cumsum=Func(Sum('amount'),template='%(expressions)s OVER (ORDER BY %(order_by)s)',order_by="id")).values('id', 'cumsum').order_by('id', 'cumsum')

views.py

def index(request):
    all_transactions = Transaction.objects.all()
    context = {
        "transactions": all_transactions
    }
    return render(request,'pages/index.html', context)

index.html

        {% for each_transaction in transactions %}
        <tr>
            <td>{{each_transaction.transaction_date}}</td>
            <td>{{each_transaction.account_nickname}}</td>
            <td>{{each_transaction.amount}}</td>
            <td>{{each_transaction.balance}}</td>
        </tr>
        {% endfor %}

{%用于事务%中的每个_事务}
{{每个交易。交易日期}
{{每笔交易.账户{u昵称}
{{each_transaction.amount}}
{{each_transaction.balance}
{%endfor%}

输出：

---

首先删除您的

@财产余额

功能

然后在

views.py中

def index(request):
    all_transactions = Transaction.objects.annotate(cumsum=Func(Sum('amount'),template='%(expressions)s OVER (ORDER BY %(order_by)s)',order_by="id"))
    context = {
        "transactions": all_transactions
    }
    return render(request,'pages/index.html', context)

然后在您的
index.html

{% for each_transaction in transactions %}
<tr>
    <td>{{each_transaction.transaction_date}}</td>
    <td>{{each_transaction.account_nickname}}</td>
    <td>{{each_transaction.amount}}</td>
    <td>{{each_transaction.cumsum}}</td>
</tr>
{% endfor %}

{%用于事务%中的每个_事务}
{{每个交易。交易日期}
{{每笔交易.账户{u昵称}
{{each_transaction.amount}}
{{each_transaction.cumsum}
{%endfor%}