django Bring data from the database for editing

Question

I created a form to create a client and another to modify it but the problem is that the modification form does not bring the information of the database.

Bring a basic form without fields with data.

view:

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)

Where is the code of ClienteForm. Please share your forms.py also. — Prakhar Trivedi
– Prakhar Trivedi, Commented Dec 28, 2016 at 4:46

ruddra · Accepted Answer · 2016-12-28 13:12:36Z

2

You need to pass your Cliente object through instance parameter in your modelform in else block.

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)

edited Dec 28, 2016 at 13:12

answered Dec 28, 2016 at 6:05

ruddra

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2 Comments

Daniel Roseman Over a year ago

The instance appears to be in the very confusingly named variable queryset, which should certainly be renamed.

ruddra Over a year ago

I agree, renamed the variable.

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