Question

I’m trying to extend the User model in Django using inheritance. Here’s my model:

class Paciente (User):
    Carteira = models.CharField(max_length=50, 
        verbose_name="Num Carteira Plano Saude",unique=True)
    Convenio = models.ForeignKey(Operadora,'Descricao', related_name="convenio", 
        verbose_name="Convenio",unique=True)
    DDD = models.CharField(max_length=2, verbose_name="DDD")
    Telefone = models.CharField(max_length=10, verbose_name="Telefone")

And here’s my view:

def paciente_register(request):
    PacienteFormSet = modelformset_factory(Paciente)

    if request.method == 'POST':
        form = PacienteFormSet(request.POST or None, 
            request.FILES or None, queryset=Paciente.objects.none(), 
            initial=[{
                'is_staff': False,
                'is_active': True, 
                'is_superuser': False, 
                'date_joined': datetime.now(), 
                'last_login': datetime.now()
            }]
        ) #incluir
        if form.is_valid():
            instance = form.save(commit=False) #pre-salva o registro
            for logvalue in instance:  # repoe os valores 'hidden' de log
                logvalue.is_staff = False
                logvalue.is_active = True
                logvalue.is_superuser = False
                logvalue.date_joined = datetime.now()
                logvalue.last_login = datetime.now()
            for reform in instance:  # salva no banco
                reform.save()
        else:
            return HttpResponseRedirect('/erro/')
    else:
        form = PacienteFormSet(queryset=Paciente.objects.none(), 
            initial=[{
                'is_staff':False,
                'is_active': True,
                'is_superuser': False,
                'date_joined': datetime.now(),
                'last_login': datetime.now()
            }]
        ) #incluir
    return render_to_response('register.html', {'form': form,}, context_instance=RequestContext(request))

And, last but not least, my template:

<form enctype="multipart/form-data" method="POST" action="/paciente_register/" >{% csrf_token %}
{{ form.management_form }}
   {% for formy in form.forms %}
      {{ formy.username.label_tag}}:{{formy.username}}<br>
      {{ formy.password.label_tag}}:{{formy.password}}<br>
      {{ formy.Carteira.label_tag}}:{{formy.Carteira}}<br>
      {{ formy.Convenio.label_tag}}:{{formy.Convenio}}<br>
      {{ formy.DDD.label_tag}}:{{formy.DDD}}<br>
      {{ formy.Telefone.label_tag}}:{{formy.Telefone}}<br>
      {{formy.is_staff.as_hidden}}
      {{formy.is_active.as_hidden}}
      {{formy.is_superuser.as_hidden}} 
      {{formy.date_joined.as_hidden}}
      {{formy.last_login.as_hidden}}

    {% endfor %}   
    <input type="submit" name="submit" value="Salvar" />
</form>

The user is supposed to register himself, but he will only have access to edit some of the fields, because the others I am setting inside the view and in the template, I am hiding them.

But the thing is that my form is not validating. I did a lot of research, but just a few examples over the internet use inheritance to extend User model. And this ones, does not show how would be the view that makes the registration of the user inside the application.

Any help would be very appreciated! 🙂

Answer 1

The problem was on the view, after all. I was forcing the fields “date_joined” and “last_login” to receive datetime.now() because I was following the Django admin template. Sadly, this wasn’t correct and everytime I tried to add a user, it was jumping to the error template, which means that the form wasn’t filled properly. The solution was to make those fields receive date.today() and now it works fine.

I think this model inheritance is still not working very good (Python 2.7 and Django 1.3). When you use it in your models, be sure of what kind of field Django is creating inside your database, and this will save you a lot of trouble.