title: Django. Simple FormView not saving
body: <p>I'm kind of new to django generic FormView. I'm missing something obvious, the form renders correctly but it is not saving the data:</p>
  
  <p><strong>forms.py</strong></p>
  
  <pre><code>from perfiles.models import Perfil
  
  class FormEditarPerfil(forms.ModelForm):
  
      class Meta:
          model = Perfil
          fields = ('descripcion',)
  </code></pre>
  
  <p><strong>views.py</strong></p>
  
  <pre><code>from django.views.generic.edit import FormView
  from forms import FormEditarPerfil
  
  class EditarPerfil(FormView):
      template_name = "perfiles/editar_perfil.html"
      form_class = FormEditarPerfil
  
      def get_success_url(self):
          url = reverse_lazy('perfiles:propio', kwargs={'username': self.request.user.username})
          return url
  </code></pre>