[Answered ]-Dynamic link in Django always calls the first url path

You something to distingish between the view type. For example you could:

urlspatterns = [
...
path('product_view/<slug:productSlug>', ProductView.as_view(), name = 'viewProduct'),
path('box_view/<slug:boxSlug>', BoxView.as_view(), name = 'BoxView'),
...
]