how can i solve Reverse for 'Add' with arguments '('',)' not found. 1 pattern(s) tried: ['agregar/(?P<producto_id>[0-9]+)/\\Z'] error?

Question

I'm doing a tutorial from django, and i getting this error when trying to add an href button, i use django 4.0.4 version and python 3.9 version.

Models.py

class Producto(models.Model):
    serie_producto = models.CharField(max_length=30)
    nombre = models.CharField(max_length=30)
    codigo = models.CharField(max_length=15)
    marca = models.CharField(max_length=30)
    precio = models.IntegerField()
    created_date = models.DateTimeField(default=timezone.now)

urls.py

...
urlpatterns = [
    ...
    path('agregar/<int:producto_id>/', agregar_producto, name="Add"),
    ...

]

template catalogo that causes te error. The message error highlights {% url 'Add' producto.id %}

{% for producto in response %}
          <div class="col-6">
            <div class="card" style="height: 10rem; width: 23rem; margin: 5px 0px;">
              <div class="card-body">
                <h5 class="card-tittle">{{producto.nombre}}</h5>
                <p class="card-text">{{producto.marca}}</p>
                <p class="card-text">{{producto.precio}}</p>
                <a href="{% url 'Add' producto.id %}" class="btn btn-primary">Agregar al carrito</a>
              </div>
            </div>
          </div>
          {% endfor %}

view.py

from tienda.models import Producto
from tienda.carrito import Carrito
def catalogo(request):
    url = "http://127.0.0.1:8000/api/Producto/"
    response = requests.get(url, auth=('admin','duoc'))
    datos = response.json()
    return render(request, 'catalogo.html', {'response' : datos })

def agregar_producto(request, producto_id):
    carrito = Carrito(request)
    producto = Producto.objects.get(id=producto_id)
    carrito.agregar(producto)
    return redirect("Tienda")

The Problem When i got to the catalogo template i get the before mentioned error, the api works perfectly when i dont use the {% url 'Add' producto.id %}, i think that is something with the id, cant read it maybe??, i dont know if is this. I have no idea how to solve this or what is wrong.

how can i solve this ?

any suggestion or help are welcome.

EDIT:

Complete error message from cmd:

File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\exception.py", line 55, in inner
    response = get_response(request)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\giova\Desktop\Pagina-Web-Django-con-Api\tienda\views.py", line 17, in catalogo
    return render(request, 'catalogo.html', {'response' : datos })
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\shortcuts.py", line 24, in render
    content = loader.render_to_string(template_name, context, request, using=using)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\loader.py", line 62, in render_to_string
    return template.render(context, request)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\backends\django.py", line 62, in render
    return self.template.render(context)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\base.py", line 175, in render
    return self._render(context)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\base.py", line 167, in _render
    return self.nodelist.render(context)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\base.py", line 1000, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\base.py", line 1000, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\base.py", line 958, in render_annotated
    return self.render(context)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\defaulttags.py", line 238, in render
    nodelist.append(node.render_annotated(context))
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\base.py", line 958, in render_annotated
    return self.render(context)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\template\defaulttags.py", line 472, in render
    url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\urls\base.py", line 88, in reverse
    return resolver._reverse_with_prefix(view, prefix, *args, **kwargs)
  File "C:\Users\giova\AppData\Local\Programs\Python\Python310\lib\site-packages\django\urls\resolvers.py", line 802, in _reverse_with_prefix
    raise NoReverseMatch(msg)
django.urls.exceptions.NoReverseMatch: Reverse for 'Add' with arguments '('',)' not found. 1 pattern(s) tried: ['agregar/(?P<producto_id>[0-9]+)/\\Z']

Answer 1

django.urls.exceptions.NoReverseMatch: Reverse for 'Add' with arguments '('',)' not found. 1 pattern(s) tried: ['agregar/(?P<producto_id>[0-9]+)/\\Z']

This error tells you that the view with name 'Add' expects an integer argument, but you passed it an empty string ''. To debug this, you can add print(datos) before your render() call. Most likely you will see a list of JSON objects with at least one that has id: "".