node.js - Join payments with database e.g. MongoDB -

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i looking in google solutions problem or tutorials, found nothing. try biuld app store online courses, have no idea how join payments (e.g. paypal) , videos. videos locked, if user make payment video unlock. have no idea join payments database e.g. payments:true/false lock/unlock course. know tutorials or articles in case?

assuming using sessions store logged in users (if not that's in to) when person pays can add session store: req.user.paid = true example. can use middleware check session variable when access route video in. add field user document indicating paid. use field set status session next time log in.





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