Hello,
I am not a very expert Ruby on Rails Developer. I finished my last project Bartering Apps and my next one will be a like StackOverflow discussion forum, because I am very interested in how developers find solutions to problems. Once that I implemented the current state of the art Discourse Forum plus Plugins, I could try to develop the following points:
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How to get answer’s comments? (stackoverflow-like & tiny)
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Downvotes…
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How to have all post (answers) as wiki by default? (maybe)
My only hope is that I get through it 
Wish me luck, I hope I am not posting something inappropriate for this discussion..
I would need some help and directions, I start one reading some discourse material and maybe cloning the github project.
Thanks
Fabrizio