node.js - update multiple records using mongoose in node with dynamic query -

i gone through below answers:- update multiple records using mongoosejs in node

update multiple docs different values

but in case query dynamic , means need query dynamically based on obj, not sure if foreach goof solution there better alternative same, taking time in each time.

     req.body.foreach(function (obj) {     mymodel.find(         {             country: obj.country,             product: obj.product,             month: parseint(obj.month),          }     ).update({             $set: {                 value: parseint(obj.value),                 'lastmodified': date.now()             }         },         { upsert: true},         function (err) {             //callback();             if (err) {                 return res.status(500).send(err);             }             return res.status(200);         }     ); 

don't know if helpful looked weren't sure parsing req.body find documents. pseudo code. maybe give idea.

app.put("/post", function(req, res){     mymodel.find({         country : req.body.country,         product : req.body.product,         month : parseint(req.body.month)     })     mymodel.save(function(err, results){         if(err) console.log(err);         console.log(results)         res.send(results)     }) })