python - Django 中的过滤器值显示奇怪

Question

我正在使用过滤器和 .aggregate 来汇总 Manifests 模型中 cases 列的值。当它显示在模板中时，它会给出正确的金额，但是当页面显示时，它会显示为例如 {'cases__sum': 1192}。数字 1192 确实是总和，但我不希望其余文本显示给用户!我怎样才能阻止这个并只获取号码？

views.py

def add_manifest(request, reference_id):
    form = CreateManifestForm(request.POST or None)
    if request.method == "POST":
        if form.is_valid():
            instance = form.save(commit=False)
            try:
                order = Orders.objects.get(id=reference_id)
                instance.reference = order
            except Orders.DoesNotExist:
                pass
            instance.save()
    form = CreateManifestForm(initial={'reference': Orders.objects.get(reference=reference_id)})
    reference = request.POST.get('reference')
    manifests = Manifests.objects.all().filter(reference=reference)
    total_cases = Manifests.objects.filter(reference=reference).aggregate(Sum('cases')) #totaling the cases for the readonly field
    totalCNF = 0
    for item in manifests:
        totalCNF += item.cases * item.CNF

    context = {
        'form': form,
        'reference_id': reference_id,
        'manifests' : manifests,
        'total_cases': total_cases,
        'totalCNF': totalCNF,

    }

    return render(request, 'add_manifest.html', context)

add_manifest.html

  <label for="form.reference" class="formlabels">Case Total:</label><br>
  <input type="text" value="{{ total_cases }}" readonly>

我只想在此 HTML 输入框中显示数字，而不是整个引用

Answer 1

聚合值存储在字典中。您可以使用

{{ total_cases.cases__sum }}

仅显示值，或在构建上下文变量时执行此操作:

...
'total_cases': total_cases['cases__sum'],