title: Express + MongoDB
body: <p>I try to connect an application to mongoDB with express, for the moment i have no problem with the collection users, it works perfectly but it doesn't work for my second collection, when i try to get all data of my second collection, express return me a empty array.</p>
  
  <pre><code>// Import dependencies
  const mongoose = require('mongoose');
  const express = require('express');
  const router = express.Router();
  
  // MongoDB URL from the docker-compose file
  const dbHost = 'mongodb://database/mybase';
  
  // Connect to data
  mongoose.connect(dbHost);
  
  // create mongoose schema
  const userSchema = new mongoose.Schema({
      mail: String,
      mdp: String,
      firstname: String,
      participants: Number
  });
  
  // create mongoose schema
  const roomSchema = new mongoose.Schema({
      roomId: String,
  });
  
  // create mongoose model
  const User = mongoose.model('User', userSchema);
  const Room = mongoose.model('Room', roomSchema);
  
  /* GET api listing. */
  router.get('/', function(req, res) {
      res.send('api works');
  });
  
  /* GET all users. */
  router.get('/users', function(req, res) {
      User.find({}, function (err, users) {
          if (err) {
              res.status(500).send(error)
          }
          res.status(200).json(users);
      });
  });
  
  /* GET all rooms. */
  router.get('/room', function(req, res) {
      Room.find({}, function (err, room) {
          if (err) {
              res.status(500).send(error)
          }
          res.status(200).json(room);
      });
  });
  
  module.exports = router;
  </code></pre>
  
  <p>In my mongo data are stored like this :</p>
  
  <pre><code>&gt; db.users.find()
  { "_id" : ObjectId("5903a7ee0e999a5054cc402b"), "mail" : "mail@google.com", "mdp" : "toto", "firstname" : "firstname", "participants" : 100 }
  { "_id" : ObjectId("5903ae7952163fd952970ed5"), "mail" : "mail2@google.com", "mdp" : "toto", "firstname" : "firstname", "participants" : 50 }
  
  &gt; db.room.find()
  { "_id" : ObjectId("59043f280d062a4959b69315"), "roomId" : "6733454" }
  </code></pre>
  
  <p>I search for a long time but to be honest, i don't know why it doesn't work, i also try to put users data into room data and to copy/paste user schema into room schema, but it doesn't work also.</p>
  
  <p>If i put the User model object in router.get room, it works, i get users data, so for me it's not a problem of route. </p>