Mongoose populate method only storing one Object

Question

I'm trying to access the array of Message Models that is stored in my Conversation Model. However, when I use the populate method to try to store the Message models as an array, only the first Message is showing up.

socket.on('connected', function (data) {
      //load all messages
      const filter = { roomId: data.roomid };
      (async () => {
        console.log('searching for Schema');
        let conversation = await Conversation.findOne(filter)
          .populate('messages')
          .exec(function (err, message) {
            if (err) console.log('no schema found');
            var array = message.messages;
            console.log(array);
            // printing only first Message
          });
      })();
    });

Conversation Schema

const ConversationSchema = new mongoose.Schema(
    {
        roomId: {
            type: String,
            required: true
        },
        messages: {
            type:  mongoose.Schema.Types.ObjectId, ref: 'Message' 
        }
    },
    {
        timestamps: true
    }
);

Answer 1

populate method not store message as an array.Population is the process of automatically replacing the specified paths in the document with document(s) from other collection(s). Refer this for more detail

To solve your problem modify declaration of messages field in Conversation Schema

messages: [{
            type:  mongoose.Schema.Types.ObjectId, ref: 'Message' 
        }]