Method constructor

src/sequelize.js:185–388

* Instantiate sequelize with name of database, username and password. * * @example * // without password / with blank password * const sequelize = new Sequelize('database', 'username', null, { * dialect: 'mysql' * }) * * // with password and options * const sequelize = n

(database, username, password, options)

   * @param {boolean}  [options.logQueryParameters=false] A flag that defines if show bind parameters in log.
   */
  constructor(database, username, password, options) {
    let config;

    if (arguments.length === 1 && typeof database === 'object') {
      // new Sequelize({ ... options })
      options = database;
      config = _.pick(options, 'host', 'port', 'database', 'username', 'password');
    } else if (arguments.length === 1 && typeof database === 'string' || arguments.length === 2 && typeof username === 'object') {
      // new Sequelize(URI, { ... options })

      config = {};
      options = username || {};

      const urlParts = url.parse(arguments[0], true);

      options.dialect = urlParts.protocol.replace(/:$/, '');
      options.host = urlParts.hostname;

      if (options.dialect === 'sqlite' && urlParts.pathname && !urlParts.pathname.startsWith('/:memory')) {
        const storagePath = path.join(options.host, urlParts.pathname);
        options.storage = path.resolve(options.storage || storagePath);
      }

      if (urlParts.pathname) {
        config.database = urlParts.pathname.replace(/^\//, '');
      }

      if (urlParts.port) {
        options.port = urlParts.port;
      }

      if (urlParts.auth) {
        const authParts = urlParts.auth.split(':');

        config.username = authParts[0];

        if (authParts.length > 1)
          config.password = authParts.slice(1).join(':');
      }

      if (urlParts.query) {
        // Allow host query argument to override the url host.
        // Enables specifying domain socket hosts which cannot be specified via the typical
        // host part of a url.
        if (urlParts.query.host) {
          options.host = urlParts.query.host;
        }

        if (options.dialectOptions) {
          Object.assign(options.dialectOptions, urlParts.query);
        } else {
          options.dialectOptions = urlParts.query;
          if (urlParts.query.options) {
            try {
              const o = JSON.parse(urlParts.query.options);
              options.dialectOptions.options = o;
            } catch (e) {
              // Nothing to do, string is not a valid JSON