django从数据库中获取数据进行编辑

Question

我创建了一个表单来创建一个客户端，另一个表单来修改它，但是问题是修改表单没有带来数据库的信息。

带基本表单，不带数据字段。

视图：

def cliente_update(request, id=None):
    queryset = get_object_or_404(Cliente, id=id)
    if request.method == 'POST':
        form = ClienteForm(request.POST or None, instance=instance)
        if form.is_valid():
            instance = form.save(commit=False)
            instance.save()
            # return HttpResponseRedirect(instance.get_absolute_url())
    else:
        form = ClienteForm()
    context = {
        "titulo": "Editar informacion del Cliente",
        "queryset": queryset,
        "form": form,
    }
    return render(request, "clientes/form.html", context)

Answer 1

您需要在else块的modelform中通过instance参数传递Cliente对象。

def cliente_update(request, id=None):
    instance = get_object_or_404(Cliente, id=id)  # renamed from queryset to instance
    if request.method == 'POST':
        form = ClienteForm(request.POST or None, instance=instance)
        if form.is_valid():
            instance = form.save(commit=False)
            instance.save()
            # return HttpResponseRedirect(instance.get_absolute_url())
    else:
        form = ClienteForm(instance=instance)

    context = {
            "titulo": "Editar informacion del Cliente",
            "form": form,
        }
    return render(request, "clientes/form.html", context)