import * as path from 'path' import { logger } from '../helpers/logger' import { LAST_MIGRATION_VERSION } from './constants' import { sequelizeTypescript } from './database' import { readdir } from 'fs-extra' async function migrate () { const tables = await sequelizeTypescript.getQueryInterface().showAllTables() // No tables, we don't need to migrate anything // The installer will do that if (tables.length === 0) return let actualVersion: number | null = null const [ rows ] = await sequelizeTypescript.query('SELECT "migrationVersion" FROM "application"') if (rows && rows[0] && rows[0].migrationVersion) { actualVersion = rows[0].migrationVersion } if (actualVersion === null) { await sequelizeTypescript.query('INSERT INTO "application" ("migrationVersion") VALUES (0)') actualVersion = 0 } // No need migrations, abort if (actualVersion >= LAST_MIGRATION_VERSION) return // If there are a new migration scripts logger.info('Begin migrations.') const migrationScripts = await getMigrationScripts() for (const migrationScript of migrationScripts) { try { await executeMigration(actualVersion, migrationScript) } catch (err) { logger.error('Cannot execute migration %s.', migrationScript.version, { err }) process.exit(-1) } } logger.info('Migrations finished. New migration version schema: %s', LAST_MIGRATION_VERSION) } // --------------------------------------------------------------------------- export { migrate } // --------------------------------------------------------------------------- async function getMigrationScripts () { const files = await readdir(path.join(__dirname, 'migrations')) const filesToMigrate: { version: string, script: string }[] = [] files .filter(file => file.endsWith('.js.map') === false) .forEach(file => { // Filename is something like 'version-blabla.js' const version = file.split('-')[0] filesToMigrate.push({ version, script: file }) }) return filesToMigrate } async function executeMigration (actualVersion: number, entity: { version: string, script: string }) { const versionScript = parseInt(entity.version, 10) // Do not execute old migration scripts if (versionScript <= actualVersion) return undefined // Load the migration module and run it const migrationScriptName = entity.script logger.info('Executing %s migration script.', migrationScriptName) const migrationScript = require(path.join(__dirname, 'migrations', migrationScriptName)) return sequelizeTypescript.transaction(async t => { const options = { transaction: t, queryInterface: sequelizeTypescript.getQueryInterface(), sequelize: sequelizeTypescript } await migrationScript.up(options) // Update the new migration version await sequelizeTypescript.query('UPDATE "application" SET "migrationVersion" = ' + versionScript, { transaction: t }) }) }