server/initializers/migrator.js

   1 'use strict'
   2
   3 const eachSeries = require('async/eachSeries')
   4 const path = require('path')
   5
   6 const constants = require('./constants')
   7 const db = require('./database')
   8 const logger = require('../helpers/logger')
   9
  10 const migrator = {
  11   migrate: migrate
  12 }
  13
  14 function migrate (callback) {
  15   db.Application.loadSqlSchemaVersion(function (err, actualVersion) {
  16     if (err) return callback(err)
  17
  18     // If there are a new mongo schemas
  19     if (!actualVersion || actualVersion < constants.LAST_SQL_SCHEMA_VERSION) {
  20       logger.info('Begin migrations.')
  21
  22       eachSeries(constants.MONGO_MIGRATION_SCRIPTS, function (entity, callbackEach) {
  23         const versionScript = entity.version
  24
  25         // Do not execute old migration scripts
  26         if (versionScript <= actualVersion) return callbackEach(null)
  27
  28         // Load the migration module and run it
  29         const migrationScriptName = entity.script
  30         logger.info('Executing %s migration script.', migrationScriptName)
  31
  32         const migrationScript = require(path.join(__dirname, 'migrations', migrationScriptName))
  33         migrationScript.up(function (err) {
  34           if (err) return callbackEach(err)
  35
  36           // Update the new mongo version schema
  37           db.Application.updateSqlSchemaVersion(versionScript, callbackEach)
  38         })
  39       }, function (err) {
  40         if (err) return callback(err)
  41
  42         logger.info('Migrations finished. New SQL version schema: %s', constants.LAST_SQL_SCHEMA_VERSION)
  43         return callback(null)
  44       })
  45     } else {
  46       return callback(null)
  47     }
  48   })
  49 }
  50
  51 // ---------------------------------------------------------------------------
  52
  53 module.exports = migrator
  54