how to Update/Edit database content with form in django - django-models

Question

i am trying to update content with form but in my html is does not load up whenn i click on the link any idea what causing the error
my views.py
def edit_address(request, id):
address = Address.objects.filter(id=id)
form = Addressform(request.POST)
if form.is_valid():
form.user = request.user
form.save()
else:
form = Addressform()
template_name = "address_edit.html"
context = {
"form": Addressform,
"Address":Address.objects.get(id=id),
}
return render(request,template_name,context)
i think the issue is in views.py that's why i only add this file tell me if you want to see any else file
my html
<div class="card col-10">
<div class="form-group form-control-sm">
<h1 class="text-center">Edit Address</h1>
<a class='back' style="float: right;" href="{% url 'accounts:home' %}">Back to site</a> <br>
{% for Address in address %}
<form method="POST">
{% csrf_token %}
<div class="col-5">{{ form.reciever_name|as_crispy_field }}</div>
<div class="col-5">{{ form.phone_no|as_crispy_field }}</div>
<div class="col-5">{{ form.alt_phone_no|as_crispy_field }}</div>
<div class="col-5">{{ form.state|as_crispy_field }}</div>
<div class="col-5">{{ form.city|as_crispy_field }}</div>
<div class="col-5">{{ form.pincode|as_crispy_field }}</div>
<div class="col-5">{{ form.address|as_crispy_field }}</div>
<div class="col-5">{{ form.locality|as_crispy_field }}</div>
<div class="col-5">{{ form.eighteen|as_crispy_field }}</div>
<br>
<button type="submit" class="btn btn-outline-success">Add Address</button>
</form>
{% endfor %}
</div>

Answer 1

You need to obtain the instance of the address to edit, and pass it as instance=… to the AddressForm:
from django.shortcuts import get_object_or_404, redirect
def edit_address(request, id):
address = get_object_or_404(Address, id=id)
if request.method == 'POST':
form = Addressform(request.POST, instance=address)
if form.is_valid():
form.instance.user = request.user
form.save()
return redirect('name-of-some-view')
else:
form = AddressForm(instance=address)
template_name = 'address_edit.html'
context = {
'form': form,
'Address': address,
}
return render(request, template_name, context)
Note: In case of a successful POST request, you should make a redirect
[Django-doc]
to implement the Post/Redirect/Get pattern [wiki].
This avoids that you make the same POST request when the user refreshes the
browser.
Note: It might be better to use the #login_required decorator
[Django-doc]
as a decorator, and thus wrap the function in it like:
from django.contrib.auth.decorators import login_required
#login_required
def edit_address(request, id):
# …
Note: You should not create a new form in case the form was not valid. A form
that is not valid will store the problems with the input in the
form.errors dictionary, and if you render the form (automatically),
it will show the errors next to the fields where these errors occur.