Find the document and insert value into array in MongoDB using Node.JS Mongoose

Question

I have a mongodb collection called 'favorite' The schema for that collection is as follows:

    var favoritesSchema = new Schema({

     postedBy: {
            type: mongoose.Schema.Types.ObjectId,
            ref: 'User'
              },
     dishes:[
             {
             type: mongoose.Schema.Types.ObjectId,
             ref: 'Dish'
             }
             ]
     },

     {timestamps:true}
     );

      var favoritesModel = mongoose.model('Favorite',favoritesSchema);

Now what I need is to find the exact document having a specific postedBy and need to insert value to the array field dishes. My code is as given below

 Favorites.find({ postedBy : req.decoded._doc._id },function(err,favorite){
       favorite.dishes.push(req.body._id);
       favorite.save(function(err,favorite)
       {
         if(err) throw err;
         console.log('favorite updated');
         res.json(favorite);
       });
     }
   });

However this is failing with TypeError: Cannot read property 'push' of undefined. Please help.

JohnnyHK · Accepted Answer · 2017-04-30 14:11:45Z

2

favorite is an array of favorite documents because you're using find. You want to use findOne here instead so that favorite is the single doc you're looking to update.

Favorites.findOne({ postedBy : req.decoded._doc._id }, function(err,favorite){
    favorite.dishes.push(req.body._id);
    favorite.save(function(err,favorite) { ...

answered Apr 30, 2017 at 14:11

JohnnyHK

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1 Comment

Joseph T F Over a year ago

I need to extract all the posts done by a same person and throw it to the users. This is for having him the option to choose which record he need to edit and then make changes to only that . what changes i need to make if i still use find instead of findOne?

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