Django: NoReverseMatch at /shop/stickers/minion-cushion/medida-y-cantidad - django

Question

I've problems when trying to access to the 2nd part of a 2 Steps form.
When clicking on a product, in a given category, for example category 'stickers' and product 'minion-cushion', users are taken to this url:
/shop/stickers/minion-cushion/medida-y-cantidad
In here they'll find a form 'StepOneForm' that only displays a tamanios (sizes in english) and cantidades (quantities in english) both as forms.ChoiceFields.
I'll capture the user's choices for this fields and save the values in the session. And then user should click on Continuar button and should be taken to this url:
/shop/stickers/minion-cushion/subir-arte
Where users will see the 2nd form "StepTwoForm" and the button to submit the form to DataBase.
However, when using this in my StepOneForm template, I get this error:
Continuar
Error:
NoReverseMatch at /shop/stickers/minion-cushion/medida-y-cantidad
Reverse for 'UploadArt' with no arguments not found. 1 pattern(s) tried: ['shop\\/(?P<c_slug>[-a-zA-Z0-9_]+)\\/(?P<product_slug>[-a-zA-Z0-9_]+)\\/subir\\-arte$']
But leaving the a tag href attribute blank lets me access this page without problems (except, obviously, I cannot access the the next page when clicking on Continue).
Continuar
Likes this:
Form in template:
<form method="post">
{% csrf_token %}
<div id="tamanios">
<legend class="text-size20 bold-font"> {{ form.tamanios.label }}</legend>
<ul class="form-items">
<li>
<span>
{{ form.tamanios.0.tag }}
{{ form.tamanios.0.choice_label }}
</span>
</li>
</ul>
</div>
Continuar
</br>
<p>Siguiente: subir imagen</p>
</form>
My urls:
app_name = 'shop'
urlpatterns = [
path('', views.allProdCat, name = 'allProdCat'),
path('<slug:c_slug>', views.allProdCat, name = 'products_by_category'),
path('<slug:c_slug>/<slug:product_slug>/medida-y-cantidad', views.StepOneView.as_view(), name='ProdCatDetail'),
path('<slug:c_slug>/<slug:product_slug>/subir-arte', views.StepTwoView.as_view(), name='UploadArt'),
]
shop/views.py
class StepOneView(FormView):
form_class = StepOneForm
template_name = 'shop/product.html'
success_url = 'shop/subir-arte'
def get_initials(self):
# pre-populate form if someone goes back and forth between forms
initial = super(StepOneView, self).get_initial()
initial['tamanios'] = self.request.session.get('tamanios', None)
initial['cantidades'] = self.request.session.get('cantidades', None)
return initial
# pre-populate form if someone goes back and forth between forms
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context['product'] = Product.objects.get(
category__slug=self.kwargs['c_slug'],
slug=self.kwargs['product_slug']
)
return context
def form_valid(self, form):
# In form_valid method we can access the form data in dict format
# and will store it in django session
self.request.session['tamanios'] = form.cleaned_data.get('tamanios')
self.request.session['cantidades'] = form.cleaned_data.get('cantidades')
return HttpResponseRedirect(self.get_success_url())
# here we are going to use CreateView to save the Third step ModelForm
class StepTwoView(CreateView):
form_class = StepTwoForm
template_name = 'shop/subir-arte.html'
success_url = '/'
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context['product'] = Product.objects.get(
category__slug=self.kwargs['c_slug'],
slug=self.kwargs['product_slug']
)
return context
def form_valid(self, form):
form.instance.tamanios = self.request.session.get('tamanios') # get tamanios from session
form.instance.cantidades = self.request.session.get('cantidades') # get cantidades from session
del self.request.session['cantidades'] # delete cantidades value from session
del self.request.session['tamanios'] # delete tamanios value from session
self.request.session.modified = True
return super(StepTwoView, self).form_valid(form)
shop/models.py
class Category(models.Model):
name = models.CharField(max_length=250, unique=True)
slug = models.SlugField(max_length=250, unique=True)
description = models.TextField(blank=True)
image = models.ImageField(upload_to='category', blank=True)
class Meta:
ordering = ('name',)
verbose_name = 'category'
verbose_name_plural = 'categories'
def get_url(self):
return reverse('shop:products_by_category', args=[self.slug])
def __str__(self):
return '{}'.format(self.name)
class Product(models.Model):
name = models.CharField(max_length=250, unique=True)
slug = models.SlugField(max_length=250, unique=True)
description = models.TextField(blank=True)
category = models.ForeignKey(Category, on_delete=models.CASCADE)
price = models.DecimalField(max_digits=10, decimal_places=2)
image = models.ImageField(upload_to='product', blank=True)
stock = models.IntegerField()
available = models.BooleanField(default=True)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
class Meta:
ordering = ('name',)
verbose_name = 'product'
verbose_name_plural = 'products'
def get_url(self):
return reverse('shop:ProdCatDetail', args=[self.category.slug, self.slug])
def __str__(self):
return '{}'.format(self.name)
class TamaniosCantidades(models.Model):
# usuario = models.ForeignKey(User, on_delete=models.DO_NOTHING)
producto = models.ForeignKey(Product, on_delete=models.CASCADE)
tamanios = models.CharField(max_length=10, choices=TAMANIOS)
cantidades = models.CharField(max_length=10, choices=CANTIDADES)
imagenes = models.FileField(upload_to='imagenes/', null=True, blank=True)
# imagenes = models.ImageField(upload_to='category', blank=True)
instrucciones = models.CharField(max_length=200, blank=True, null=True, default='')
uploaded_at = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.tamanios
shop/forms.py
class StepOneForm(forms.Form):
tamanios = forms.ChoiceField(choices=TAMANIOS, widget=forms.RadioSelect(), label='Selecciona un tamaño')
cantidades = forms.ChoiceField(choices=CANTIDADES, widget=forms.RadioSelect(), label='Selecciona la cantidad')
class StepTwoForm(forms.ModelForm):
instrucciones = forms.CharField(widget=forms.Textarea)
class Meta:
model = TamaniosCantidades
fields = ('imagenes', 'instrucciones')
def __init__(self, *args, **kwargs):
super(StepTwoForm, self).__init__(*args, **kwargs)
self.fields['instrucciones'].required = False

Answer 1

Because uploadart has arguments ( c_slug and product_slug ):
path('<slug:c_slug>/<slug:product_slug>/subir-arte',
views.StepTwoView.as_view(),
name='UploadArt'),
Your url must to inform this arguments:
<a href="{% url 'shop:UploadArt' _some_data_here_ _some_data_here_ %}"
Take a look to django url docs samples