On Jul 4, 8:42 pm, Carlos Eduardo Sotelo Pinto
<csot...@aqpglug.org.pe> wrote:
> Hi people... I have this traceback error and i am something lost, thanks
>
<snip>
> Exception Type: AttributeError at /support/helping/product/1/1
> Exception Value: type object 'ProductModel' has no attribute 'id'
>
> #----model
> class ProductModel (models.Model):
> maker = models.ForeignKey(Maker)
> product_type = models.ForeignKey(ProductType)
> name = models.CharField(u'Modelo', max_length=32)
> created = models.DateTimeField(u'Creado', auto_now_add=True)
> modified = models.DateTimeField(u'Modificado', auto_now=True)
> def __unicode__(self):
> return self.name
>
> #---- form
> class ProductModelForm(forms.ModelForm):
> product_model = forms.ModelChoiceField(ProductModel.objects.all(),
> None, u'Modelo')
> class Meta:
> model = ProductModel
> exclude = ['maker', 'product_type']
> def __init__(self, maker_filter, *args, **kwargs):
> self.base_fields['product_model'].query =
> ProductModel.objects.all().filter(maker=maker_filter)
> self.base_fields['product_model'].widget.choices =
> self.base_fields['product_model'].choices
> super(ProductModelForm, self).__init__(*args, **kwargs)
>
> #---- view
> def product(request, maker_id, product_type_id):
> if request.method == 'POST':
> pmform = ProductModelForm(request.POST)
> if mform.is_valid():
> maker = topic = mform.cleaned_data['maker']
> path = '/support/helping/product/%s' % maker
> return HttpResponseRedirect(path)
> else:
> pmform = ProductModelForm(maker_filter=maker_id, data=None,
> instance=ProductModel)
> return render_to_response('helping.html', {'mform': pmform})
>
> --
> Carlos Eduardo Sotelo Pinto a.k.a. krlos
Wow, quite a lot wrong here, I don't know where to start.
The immediate cause of your problem is that you're passing in the
model class, ProductModel, as the instance parameter. As the name
implies, the instance should be an actual instance - ie an actual
productmodel, not the class.
When you've fixed that, you'll quickly come into problems when you
submit the form. For a start, you don't save it at all; after that,
this line is bound to fail:
maker = topic = mform.cleaned_data['maker']
because you've explicitly *excluded* 'maker' from the list of form
fields.
And then you've got the fact that you've added a product_model field,
where you choose from a list of product models, to the form where you
actually define a product model... that makes no sense. And so on.
My advice is to go back to basics. Read the documentation and make
sure you understand how to define a standard model form. Ensure that
you have the correct logic to instantiate and save a form for both a
completely new item, and for editing an existing one. Then you can try
customising things, a little at a time.
If there are specific things you don't understand, post here and we'll
help. But there's really no point in jumping right in and trying a
whole load of stuff when you haven't got the basics down.
--
DR.
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