Custom Condition with Range

[John P]

I'm trying to build a custom Condition that uses Range.

I tried following the instructions here: http://django-oscar.readthedocs.org/en/latest/howto/how_to_create_a_custom_condition.html
But when I go to /dashboard/offers/3/condition/
It shows the custom condition, but there's no way for me to specify range.

What's the best way to go about creating a condition like this?

Thanks,

John

[John P]

I tried inserting another Condition using: /admin/offer/condition/add/

I thought I could manually add a second condition with the same Custom class, but a different range, but I got the following error:

• Condition with this Custom class already exists.