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POunique_together validation fails if one of the fields is excluded from form
 

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  1. POunique_together validation fails if one of the fields is excluded from form
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    <p>I have a model Menu:</p> <pre><code>class Menu(models.Model): loja = models.ForeignKey(Loja, related_name='menus') nome = models.CharField(max_length=30) ordenacao = models.IntegerField(blank=True, null=True) class Meta: ordering = ('ordenacao',) #prevent equally named menus within a store(loja) unique_together = ('loja', 'nome') def __unicode__(self): return self.nome </code></pre> <p>The Menu form:</p> <pre><code>class MenuForm(ModelForm): class Meta: model = Menu exclude =('loja', 'ordenacao',) </code></pre> <p>Add menu view:</p> <pre><code>def addmenu(request, s_loja): loja = get_object_or_404(Loja, slug=s_loja) if not loja.activo: return render_to_response('painelcontrolo/loja_detail.html', { 'notificacoes': ['Loja está definida como inactivo.', \ 'Alterações não permitidas']}) if request.method == 'POST': menu = Menu(loja=loja) form = MenuForm(request.POST, instance=menu) if form.is_valid(): menu_existe = Menu.objects.\ filter(nome=form.cleaned_data['nome']).\ filter(loja=loja) if menu_existe: return render_to_response(\ 'painelcontrolo/loja_detail.html', { 'notificacoes': ['Já existe um menu com esse nome'] }) form.save() return render_to_response(\ 'painelcontrolo/loja_detail.html', { 'notificacoes': ['Menu adicionado'] }) else: form = MenuForm() return render_to_response('form_as_p.html', { 'form': form }) </code></pre> <p>The error:(no longer occurs with the added validation on the addmenu view)</p> <pre><code>Request Method: POST Request URL: http://127.0.0.1:8000/painel/bispos/addmenu/ Exception Type: IntegrityError Exception Value: columns loja_id, nome are not unique </code></pre> <p>The question: The form is valid, but the model isn't if nome+loja_id already exist on the db. Do I need to add this validation somewhere else? And where?</p> <p>edit: I wrote a validation on the view and it passes a notification to the template and this is fine, but not perfect. I would like to re-display the form with the user input to give an opportunity to fix what's wrong without losing that information. Is there a way to do that?</p>
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