enroll when user register in joomla registration page

hi.
is there any solution that when a user in the registration page and fill registration form, we have a field or radio bax or drapdown to select a course that the user want to enroll that, and if that course is free , the user enroll very fast to that and if the course is not free the user redirect to pay for that.
one off my problem after integrate joomla and moodle via joomdle is this:
the user must register in one step and in other step the user must go to enroll in the course and etc,,,
can he/she directly enroll in to course when he register ?
or
is there any tricky solution for do that?

Hi.

I think the best way to get what you want is to have courses in shop, and let users pick courses, free and paid, there. Once they checkout they will register.

what's your idea about using "coursegroups_v1.0.1 "or jcohort in joomdle download page and component for joomla that ask user to select what's group you want in the registration page of joomla?

Those components/plugins don't have a front-end UI for users to select anything. They just allow you to map Joomla groups to Moodle courses/cohorts.

Maybe you could get what you want using:
- The coursegroups component/plugin
- Some Joomla plugin that lets you pick group on registration