Question

我在视图之间使用两个会话。这些会话及其相应的['key']的值将为空列表或包含值的列表。

您可以在代码中看到，请求会话密钥始终存在，因为它已使用列表设置为空或不为空。问题是，即使列表具有值，它的行为也好像是空的。它总是与第二个视图的模板中的else块一起出现。

视图1：初始化列表并设置会话

def apply_fees(request):
    included = []
    excluded = []

    if request.POST:
        form = applyfees_form(request.POST)
        if request.POST.get('applyBtn'):

            checks_list = request.POST.getlist('checks')
            payment_id = request.POST.get('fee_selection')

            for item in checks_list:
                stud = User.objects.get(username=item)
                fee = Fee.objects.get(payment_id=payment_id)
                obj, created = FinedStudent.objects.get_or_create(pays_id=fee, stud_id=stud)
                if created:
                    name = stud.first_name + ' ' + stud.last_name
                    excluded.append(name)
                else:
                    obj.save()
                    name = stud.first_name + ' ' + stud.last_name
                    included.append(name)

            request.session['included'] = included
            request.session['excluded'] = excluded

            return render(request, 'studentapp/confirmApplyFees.html')

我可以说request ['included']有一个包含值的列表，因为obj.save被触发了，所以我假设append方法也被触发了。

视图2：在上下文中设置具有请求会话数据的字典键值

def confirm_apply(request):
    context = {
        'included': request.session.get('included'),
        'excluded': request.session.get('excluded'),
    }


    return render(request, 'studentapp/confirmApplyFees.html', context)

视图2的模板：

 <table class="table">
     <thead class=" text-primary">
        <th>Name</th>
     </thead>

    <tbody>
     {% if included %}

        {% for item in included%}

                <tr>
                  <td>{{item}}</td>
                </tr>

        {%endfor%}

     {% else %}

        <tr>
          <td>No students to be shown</td>
        </tr>

     {% endif %}

    </tbody>

如何检查具有特定键的会话在Django中是否具有空列表值

0 个答案: