node.js - I push an object to my Array in mongoose, array only stores its length -

i try push object array in mongoose, whenever it, puts length this(mongoose, attribute schoolcomment @ bottom), using mlab.com database.

{     "_id": {         "$oid": "58e17ee3e24dfb1f70d76460"     },     "schoolname": "koc universitesi",     "schoolilce": "sariyer",     "schoolsehir": "istanbul",     "schoolid": 981299,     "__v": 5,     "schoolcomments": [         3     ] } 

this code in node js (the comments not appearing in html because of reason)

app.post('/comment', function(req, res){   if(req.session.user && req.session){     user.findone({email: req.session.user.email}, function(err, user){     if(err) {       res.send('error');     }     if(user){       if(req.session.user.password === user.password){         var thisid = user.userid;         universite.findone({schoolname: req.body.collegename}, function(err, college){             if(err) res.send('error');             if(college){               college.set({schoolcomments: college.schoolcomments.push({thisid: req.body.comment})}).save(function(err){                 if(err){                   res.render('errors', {error:'error'});                 }else{                   res.locals.college = college;                   res.locals.user = user;                   res.render('universiteinfouser');                 }               });             }         });       }else{         res.render('login', {});       }       }     });   } }); 

and html dom form it. comments not appearing because of reasons.

<form onkeypress="enterpress();" action="/comment" method="post">           <textarea maxlength="100" style="font-size: 25px;" name="comment" rows="3" cols="50" placeholder="yorumunuzu yazin..."></textarea><br>           <input style="display: none; visibility: hidden;" type="text" name="collegename" value="<%=college.schoolname%>"></input>           <button type="submit" name="commentsubmit">comment submit</button>         </form>           <div class="usercommentdisplay">             <ul>               <%college.schoolcomments.foreach(function(item, i){%>                   <%var k = college.schoolcomments[i]%>                   <%for(key in k){%>                     <%if(key === user.userid){%>                       <li><%=k[key]%> same</li>                     <%}else{%>                       <li><%=k[key]%></li>                     <%}%>                   <%}%>               <%})%>             </ul>           </div> 

you may want use findoneandupdate , build comment item dynamically (to set dynamic field name) :

var item = {}; item[user.userid] = req.body.comment;  universite.findoneandupdate({     schoolname: req.body.collegename }, {     $push: {         "schoolcomments": item     } }, { new: true }, function(err, college) {     if (err) {         res.render('errors', { error: 'error' });     } else {         res.locals.college = college;         res.locals.user = user;         res.render('universiteinfouser');     } }); 

note i've aded { new: true } in order return modified document college instead of unaltered one.

fyi, in code, have used js method array.prototype.push() return new length of array using college.schoolcomments.push