Auto-migrate and Auto-update Promise Module loopback

database-module.js

const app = require('../server');

const log = require('debug')('boot:automigrate');
const path = require('path');
const env = process.env.NODE_ENV;

let datasources = require(path.resolve(__dirname, '../datasources.production.json'));
let models = path.resolve(__dirname, '../model-config.production.json')


module.exports = {

  autoUpdateAll: function(key) {
    if (typeof models[key].dataSource != 'undefined') {
      if (typeof datasources[models[key].dataSource] != 'undefined') {
        return app.dataSources[models[key].dataSource].autoupdate(key)
          .then(() => {
            log('Model ' + key + ' updated');
            return Promise.resolve(key);
          })
          .catch(() => {
            log('Error running autoupdate(' + key + ')', err);
            return Promise.reject(new Error('Error autoupdate(' + key + ')', err));
          });
      }
    }
  },

  autoMigrateAll: function(key) {
    if (typeof models[key].dataSource != 'undefined') {
      if (typeof datasources[models[key].dataSource] != 'undefined') {
        return app.dataSources[models[key].dataSource].automigrate(key)
          .then(() => {
            log('Model ' + key + ' migrated');
            return Promise.resolve(key);
          })
          .catch((err) => {
            log('Error running automigrate(' + key + ')', err);
            return Promise.reject(new Error('Error automigrate(' + key + ')', err));
          });
      }
    }
  }

};

migrate.js

let models = require(path.resolve(__dirname, '../model-config.json'));

let databaseAction =  env === 'production' ? database.autoMigrateAll: database.autoUpdateAll;

Promise.all(Object.keys(models).map(databaseAction))
  .then(() => Promise.all(...)
  .catch((error) => {
    log('Error: ', error);
  });