想要在 django 模板中使用动态键遍历字典

Question

我在字典中有特定键的字典。 现在我想动态访问模板中的每个键。 我想使用主键作为表中的子标题，并在这些子标题下显示相关键的数据。

我已经尝试了下面的代码，但它不起作用。

错误：

TemplateSyntaxError at /daily/report
Could not parse the remainder: '{{ledger}}' from 'ledgers.{{ledger}}

我怎样才能做到这一点？

我的观点：

@login_required
def accounts_report(request):
    credit_vouchers = CreditVoucher.objects.all()
    debit_vouchers = DebitVoucher.objects.all()
    heads = AccountHead.objects.all()
    opening_balance = request.GET.get('balance')
    balance = float(opening_balance)
    date_from = request.GET.get('from')
    date_to = request.GET.get('to')
    credit_vouchers = credit_vouchers.filter(date__gte=date_from, date__lte=date_to)
    debit_vouchers = debit_vouchers.filter(date__gte=date_from, date__lte=date_to)

    ledgers = {}
    for head in heads:
        key = head.head_name
        ledgers.setdefault(key, [])

    for item in ledgers:
        key = item
        ledgers.setdefault(key, [])
        a_head = AccountHead.objects.get(head_name=key)
        d_vouchers = debit_vouchers.filter(account_head=a_head)
        c_vouchers = credit_vouchers.filter(account_head=a_head)
        for voucher in d_vouchers:
            balance -= voucher.amount
            ledgers[key].append({
                'date': voucher.date,
                'description': voucher.description,
                'voucher_no': voucher.voucher_serial,
                'debit_amount': voucher.amount,
                'credit_amount': 0,
                'balance': balance,
            })
        for voucher in c_vouchers:
            balance += voucher.amount
            ledgers[key].append({
                'date': voucher.date,
                'description': voucher.description,
                'voucher_no': voucher.voucher_serial,
                'debit_amount': 0,
                'credit_amount': voucher.amount,
                'balance': balance,
            })

    context = {
        'heads': heads,
        'opening_balance': opening_balance,
        'ledgers': ledgers
    }

    return render(request, 'accounts/report.html', context=context)

模板：


<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        table, th, td {
            border: 1px solid black;
            border-collapse: collapse;
        }

        table.center {
            margin-left: auto;
            margin-right: auto;
        }
    </style>
</head>
<body>
<table>
    <thead>
    <tr>
        <th>Voucher No</th>
        <th>Date</th>
        <th>Description</th>
        <th>Debit</th>
        <th>Credit</th>
        <th>Balance</th>
    </tr>
    </thead>
    <tbody>
    <tr>
        <td colspan="5">Opening Balance</td>
        <td>{{opening_balance}}</td>
    </tr>
    {% for ledger in ledgers %}
        <tr>
            <td colspan="6">{{ledger}}</td>
        </tr>
        {% for item in ledgers.{{ledger}} %}
        <tr>
            <td>{{item.voucher_no}}</td>
            <td>{{item.date}}</td>
            <td>{{item.description}}</td>
            <td>{{item.debit_amount}}</td>
            <td>{{item.credit_amount}}</td>
            <td>{{item.balance}}</td>
        </tr>
        {% endfor %}
    {% endfor %}
    </tbody>
</table>
</body>
</html>

Answer 1

将ledgers.{{ledger}}替换为仅ledger

{% for ledger in ledgers %}
            <tr>
                <td colspan="6">{{ledger}}</td>
            </tr>
            {% for item in ledger %}
            <tr>
                <td>{{item.voucher_no}}</td>
                <td>{{item.date}}</td>
                <td>{{item.description}}</td>
                <td>{{item.debit_amount}}</td>
                <td>{{item.credit_amount}}</td>
                <td>{{item.balance}}</td>
            </tr>
            {% endfor %}
        {% endfor %}

Answer 2

在 Django 模板中使用动态键的唯一方法是编写自定义过滤器。

您可以在templatetags文件夹中创建一个get_dictionnary_item.py ：

from django.template.defaulttags import register

@register.filter
def get_dictionary_item(dictionary, key):
    return dictionary.get(key)

然后你可以在你的模板中使用它：

{% load get_dictionary_item %}
...
{{ ledgers|get_dictionary_item:ledger }}

想要在 django 模板中使用动态键遍历字典

问题描述

2 个解决方案

解决方案1
0 2021-07-20 17:00:37

解决方案2
0 已采纳 2021-07-20 18:19:36

想要在 django 模板中使用动态键遍历字典

问题描述

2 个解决方案

解决方案1 0 2021-07-20 17:00:37

解决方案2 0 已采纳 2021-07-20 18:19:36

解决方案1
0 2021-07-20 17:00:37

解决方案2
0 已采纳 2021-07-20 18:19:36