angularjs - Angular and Mongoose - Cant access some user value. Others appear fine -

im creating comments system , im trying add values view such text, username, timeposted , userprofileimageurl 1 wont appear userprofileimageurl.

i think problem controller function somewhere else altogether.

 /**  * comment middleware  */ exports.commentbyid = function (req, res, next, id) {     comment.findbyid(id).populate('user', 'displayname').exec(function (err, comment) {         if (err) return next(err);         if (!comment) return next(new error('failed load comment ' + id));         req.comment = comment;         next();     }); }; 

or here possibly

/**  * list of comments  */  exports.list = function (req, res) {      var id = req.dealid;     console.log('log - ' + id);     comment.find( )         .sort('-created')         .populate('user', 'displayname')         .exec(function (err, comments) {              if (err) {                 return res.status(400).send({                     message: errorhandler.geterrormessage(err)                 });             } else {                 res.jsonp(comments);             }         }); }; 

what 'user' , 'displayname' parameter in function do?

can add 'userprofileimageurl' returned data somehow?

im using profileimageurl value this. display name showing not profileimageurl

<img ng-src="{{post.user.profileimageurl}}" alt="{{post.user.displayname}}" /> 

/**  * list of comments  */  exports.list = function (req, res) {      var id = req.dealid;     console.log('log - ' + id);     comment.find( )         .sort('-created')         .populate('user')         .exec(function (err, comments) {              if (err) {                 return res.status(400).send({                     message: errorhandler.geterrormessage(err)                 });             } else {                 res.jsonp(comments);             }         }); }; 

just have delete displayname parameter , send whole user object.