Django 2 url path matching negative value

Question

In Django <2 the normal way of doing this is to use regex expression. But it is now recommended in Django => 2 to use path() instead of url()

path('account/<int:code>/', views.account_code, name='account-code')

This looks okay and works well matching url pattern

/account/23/
/account/3000/

However, this issue is that I also want this to match negative integer like

/account/-23/

Please how do I do this using path()?

Answer 1

You can write custom path converter:

class NegativeIntConverter:
    regex = '-?\d+'

    def to_python(self, value):
        return int(value)

    def to_url(self, value):
        return '%d' % value

In urls.py:

from django.urls import register_converter, path

from . import converters, views

register_converter(converters.NegativeIntConverter, 'negint')

urlpatterns = [
    path('account/<negint:code>/', views.account_code),
    ...
]