.pluck returning undefined in Meteor -

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trying pull list of ratings collection of reviews , average them come aggregated average rating plate. when @ data output ratings variable nothing "undefined undefined undefined".

averagerating: function() {     var reviews = reviews.findone({plateid: this._id});     var ratings = _.pluck(reviews, 'rating');     var sum = ratings.reduce(function(pv, cv){return pv + cv;}, 0);     var avg = sum / ratings.length;      //testing output     var test = "";     var x;     (x in reviews) {         text += reviews[x] + ',';     }      return test; }

sorry if super newbie question, i've been @ hours , cannot figure out.

i figured out issue. listed above var reviews gets set cursor apparently .pluck not work on. first converting cursor array of objects able use .pluck. updated code looks this:

averagerating: function() {     var reviewscursor = reviews.find({plateid: this._id});     //converts cursor array of objects     var reviews = reviewscursor.fetch();     var ratings = _.pluck(reviews, 'rating');     var sum = ratings.reduce(function(pv, cv){return pv + cv;}, 0);     var avg = (sum / ratings.length).toprecision(2);      return avg;  }

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