128 lines
3.5 KiB
JavaScript
128 lines
3.5 KiB
JavaScript
'use strict'
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const waterfall = require('async/waterfall')
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const eachSeries = require('async/eachSeries')
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const fs = require('fs')
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const path = require('path')
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const constants = require('./constants')
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const db = require('./database')
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const logger = require('../helpers/logger')
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const migrator = {
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migrate: migrate
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}
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function migrate (finalCallback) {
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waterfall([
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function checkApplicationTableExists (callback) {
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db.sequelize.getQueryInterface().showAllTables().asCallback(function (err, tables) {
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if (err) return callback(err)
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// No tables, we don't need to migrate anything
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// The installer will do that
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if (tables.length === 0) return finalCallback(null)
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return callback(null)
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})
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},
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function loadMigrationVersion (callback) {
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db.Application.loadMigrationVersion(callback)
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},
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function abortMigrationIfNotNeeded (actualVersion, callback) {
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// No need migrations
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if (actualVersion >= constants.LAST_MIGRATION_VERSION) return finalCallback(null)
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return callback(null, actualVersion)
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},
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function getMigrations (actualVersion, callback) {
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// If there are a new migration scripts
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logger.info('Begin migrations.')
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getMigrationScripts(function (err, migrationScripts) {
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return callback(err, actualVersion, migrationScripts)
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})
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},
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function doMigrations (actualVersion, migrationScripts, callback) {
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eachSeries(migrationScripts, function (entity, callbackEach) {
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executeMigration(actualVersion, entity, callbackEach)
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}, function (err) {
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if (err) return callback(err)
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logger.info('Migrations finished. New migration version schema: %s', constants.LAST_MIGRATION_VERSION)
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return callback(null)
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})
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}
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], finalCallback)
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}
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// ---------------------------------------------------------------------------
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module.exports = migrator
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// ---------------------------------------------------------------------------
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function getMigrationScripts (callback) {
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fs.readdir(path.join(__dirname, 'migrations'), function (err, files) {
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if (err) return callback(err)
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const filesToMigrate = []
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files.forEach(function (file) {
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// Filename is something like 'version-blabla.js'
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const version = file.split('-')[0]
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filesToMigrate.push({
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version,
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script: file
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})
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})
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return callback(err, filesToMigrate)
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})
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}
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function executeMigration (actualVersion, entity, callback) {
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const versionScript = parseInt(entity.version)
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// Do not execute old migration scripts
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if (versionScript <= actualVersion) return callback(null)
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// Load the migration module and run it
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const migrationScriptName = entity.script
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logger.info('Executing %s migration script.', migrationScriptName)
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const migrationScript = require(path.join(__dirname, 'migrations', migrationScriptName))
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db.sequelize.transaction().asCallback(function (err, t) {
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if (err) return callback(err)
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const options = {
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transaction: t,
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queryInterface: db.sequelize.getQueryInterface(),
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sequelize: db.sequelize,
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Sequelize: db.Sequelize
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}
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migrationScript.up(options, function (err) {
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if (err) {
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t.rollback()
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return callback(err)
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}
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// Update the new migration version
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db.Application.updateMigrationVersion(versionScript, t, function (err) {
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if (err) {
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t.rollback()
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return callback(err)
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}
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t.commit().asCallback(callback)
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})
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})
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})
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}
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