NoReverseMatch at /plat/salade-nicoise/

Question

I hope you're well.

It's probably a very simple question but:

• if I name my Catego "exemple" and if I give "exemple" to the same of the slug, anything works
• if I name my Catego "Salade Nicoise" and if I give "salade-nicoise" to the same of the slug, I've the issue:

Reverse for 'post_catego' with arguments '('salade nicoise',)' not found. 1 pattern(s) tried: ['plat/(?P[-a-zA-Z0-9_]+)/$']

So if the name of the slug and the catego are the same it works, but if not it does not works.

Could someone explain to me why that works like?

views.py

def catego(request, slug):
    catego = Catego.objects.get(slug=slug)
    
    context = {
        'catego': catego
    }

models.py

class Catego(models.Model):
    name = models.CharField(max_length=20)
    slug = models.SlugField(default='nocategory')
    status = models.IntegerField(choices=STATUS, default=0)
    
    def __str__(self):
        return self.name

class Post(models.Model):
    ...
    categories = models.ManyToManyField('Catego', related_name='posts')

urls.py

path('plat/<slug:slug>/', catego, name="post_catego"),

post_catego.html

{% for post in catego.posts.all %}
...
{% for catego in post.categories.all %} <a href="{% url 'post_catego' catego.name %}">&#128154; {{ catego.name }}</a>{% endfor %}
...
{% enfor %}

Answer 1

I hope you're well too.

It has probably a very simple answer in your post_catego.html when passing the url value put catego.slug instead of catego.name.

post_catego.html

{% for post in catego.posts.all %}
...
{% for catego in post.categories.all %} <a href="{% url 'post_catego' catego.slug %}">&#128154; {{ catego.name }}</a>{% endfor %}
...
{% enfor %}