I want to add a comment object to an array in camps collection.

When i console.log the array i find my added data.

But then i check my data base, i find that the comments array is empty.

    app.post('/campgrounds/:id/comments', function(req, res){
      Camp.findById(req.params.id, function(err, campComm){
        if(err){
          console.log(err);
          res.redirect('/campgrounds');
        }else{
          Comment.create(req.body.comment, function(err, comm){
            if(err){
              console.log(err);
            }else{
              campComm.comments.push(comm);
              console.log(campComm.comments);
              console.log(comm);
              campComm.save();
              console.log(campComm.comments);
              res.redirect("/campgrounds/" + campComm._id);
            }
          });
        }
      });
    });

This is the Camp Schema

    var campgroundSchema = new mongoose.Schema({
      name: String,
      img: String,
      description: String,
      comments: [
        {
          type: mongoose.Schema.Types.ObjectId,
          ref: "Comment"
        }
      ]
    });

This is the Comment Schema

    var commentSchema = new mongoose.Schema({
      text: String,
      author: String
    });