parse.com - How to use relations between a Parse subclass and an User - Swift -


i building quiz app , have class named "questions" in parse. when user answers question, wanted question removed questions needs answer. wanted add subclass named "questionanswered", boolean return true questions user had answered. problem boolean should unique each user. how can implement in parse , in swift?

thank you.

one way have relation user on questions called answeredby, , add user relation when answer question 

var relation = question.relationforkey("answeredby") relation.addobject(auser) question.saveinbackground()

then, query questions haven't been answered user add questionquery.wherekey("answeredby", notequalto:auser) constraint question query.

i'm not sure how scale though, ymmv. might want testing on if you're expecting decent traffic.


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