Words.update({
            userId: req.session.passport.user,
            folderId: req.body.folderId,
            word:req.body.addword
        }, {
            $set:{
                userId: req.session.passport.user,
                folderId: req.body.folderId,
                word:req.body.addword,
                meaning: req.body.addmeaning,
                example: req.body.addexample,
                image: req.body.addimage,
                NoCorrectAns: 0,
                createdAt: Date()
            }

        },{
            upsert: true
        });