how to filter on existing url

[c0ntribut0r]

how to filter on existing url

[0xE111]

Filtering by brand is something more complicated than just changing your template and models. You also need to do some work in views.py.

This would take time, and this question is not related to the sources of this repo. I cannot write your code for you. Learn django basics on djangoproject.com.

P.S.
You don't need TreeForeignKey in your Product model, and default='' in ForeignKey is also nonsense. Your related_name='brand' is ambiguous, make it more verbose and explanatory. Correct your model:

class Product(models.Model):
    brand = ForeignKey('Brand', verbose_name='brands', related_name='products')
    category = ForeignKey('Category', verbose_name='categories', related_name='products' )