[Answered ]-How to escape '/' in django urls

From Django models docs:

A slug is a short label for something, containing only letters, numbers, underscores or hyphens.

So the 404 is actually correct, maybe use another field.

Django path converters match strings in the input URL using regex.
The default path converters are pretty basic – source code.

The slugConverter matches any string that only contains characters, numbers, and dashes, not forward slashes. In string yourtexthere/moretext the largest substring it will match is yourtexthere.

The pathConverter matches a string containing any type of character, so the result can contain a forward slash. It will match all of yourtexthere/moretext. So change your urlpatterns to this:

# Only patterns
urlpatterns = [
    path('', home, name='home'),
    path('<path:slug>/', textview, name='textview'),
]

The pathConverter will match all special characters. If you don’t want this you can create your own custom converter with a regex tailored to your needs. For example, you could simply extend the slugConverter to also match strings with forward slashes.

class SlugPathConverter(StringConverter):
    regex = '[-a-zA-Z0-9_/]+'