connection-manager.js
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'use strict';
const AbstractConnectionManager = require('../abstract/connection-manager');
const Utils = require('../../utils');
const debug = Utils.getLogger().debugContext('connection:pg');
const Promise = require('../../promise');
const sequelizeErrors = require('../../errors');
const semver = require('semver');
const dataTypes = require('../../data-types');
const moment = require('moment-timezone');
class ConnectionManager extends AbstractConnectionManager {
constructor(dialect, sequelize) {
super(dialect, sequelize);
this.sequelize = sequelize;
this.sequelize.config.port = this.sequelize.config.port || 5432;
try {
let pgLib;
if (sequelize.config.dialectModulePath) {
pgLib = require(sequelize.config.dialectModulePath);
} else {
pgLib = require('pg');
}
this.lib = sequelize.config.native ? pgLib.native : pgLib;
} catch (err) {
if (err.code === 'MODULE_NOT_FOUND') {
throw new Error('Please install \'' + (sequelize.config.dialectModulePath || 'pg') + '\' module manually');
}
throw err;
}
this.refreshTypeParser(dataTypes.postgres);
}
// Expose this as a method so that the parsing may be updated when the user has added additional, custom types
_refreshTypeParser(dataType) {
if (dataType.types.postgres.oids) {
for (const oid of dataType.types.postgres.oids) {
this.lib.types.setTypeParser(oid, value => dataType.parse(value, oid, this.lib.types.getTypeParser));
}
}
if (dataType.types.postgres.array_oids) {
for (const oid of dataType.types.postgres.array_oids) {
this.lib.types.setTypeParser(oid, value =>
this.lib.types.arrayParser.create(value, v =>
dataType.parse(v, oid, this.lib.types.getTypeParser)
).parse()
);
}
}
}
connect(config) {
config.user = config.username;
const connectionConfig = Utils._.pick(config, [
'user', 'password', 'host', 'database', 'port'
]);
if (config.dialectOptions) {
Utils._.merge(connectionConfig,
Utils._.pick(config.dialectOptions, [
// see [http://www.postgresql.org/docs/9.3/static/runtime-config-logging.html#GUC-APPLICATION-NAME]
'application_name',
// choose the SSL mode with the PGSSLMODE environment variable
// object format: [https://github.com/brianc/node-postgres/blob/master/lib/connection.js#L79]
// see also [http://www.postgresql.org/docs/9.3/static/libpq-ssl.html]
'ssl',
// In addition to the values accepted by the corresponding server,
// you can use "auto" to determine the right encoding from the
// current locale in the client (LC_CTYPE environment variable on Unix systems)
'client_encoding',
// !! DONT SET THIS TO TRUE !!
// (unless you know what you're doing)
// see [http://www.postgresql.org/message-id/flat/bc9549a50706040852u27633f41ib1e6b09f8339d845@mail.gmail.com#bc9549a50706040852u27633f41ib1e6b09f8339d845@mail.gmail.com]
'binary'
]));
}
return new Promise((resolve, reject) => {
const connection = new this.lib.Client(connectionConfig);
let responded = false;
connection.connect(err => {
if (err) {
if (err.code) {
switch (err.code) {
case 'ECONNREFUSED':
reject(new sequelizeErrors.ConnectionRefusedError(err));
break;
case 'ENOTFOUND':
reject(new sequelizeErrors.HostNotFoundError(err));
break;
case 'EHOSTUNREACH':
reject(new sequelizeErrors.HostNotReachableError(err));
break;
case 'EINVAL':
reject(new sequelizeErrors.InvalidConnectionError(err));
break;
default:
reject(new sequelizeErrors.ConnectionError(err));
break;
}
} else {
reject(new sequelizeErrors.ConnectionError(err));
}
return;
}
responded = true;
debug('connection acquired');
resolve(connection);
});
// If we didn't ever hear from the client.connect() callback the connection timeout, node-postgres does not treat this as an error since no active query was ever emitted
connection.on('end', () => {
debug('connection timeout');
if (!responded) {
reject(new sequelizeErrors.ConnectionTimedOutError(new Error('Connection timed out')));
}
});
// Don't let a Postgres restart (or error) to take down the whole app
connection.on('error', err => {
debug(`connection error ${err.code}`);
connection._invalid = true;
});
}).tap(connection => {
// Disable escape characters in strings, see https://github.com/sequelize/sequelize/issues/3545
let query = '';
if (this.sequelize.options.databaseVersion !== 0 && semver.gte(this.sequelize.options.databaseVersion, '8.2.0')) {
query += 'SET standard_conforming_strings=on;';
}
if (!this.sequelize.config.keepDefaultTimezone) {
const isZone = !!moment.tz.zone(this.sequelize.options.timezone);
if (isZone) {
query += 'SET client_min_messages TO warning; SET TIME ZONE \'' + this.sequelize.options.timezone + '\';';
} else {
query += 'SET client_min_messages TO warning; SET TIME ZONE INTERVAL \'' + this.sequelize.options.timezone + '\' HOUR TO MINUTE;';
}
}
// oids for hstore and geometry are dynamic - so select them at connection time
const supportedVersion = this.sequelize.options.databaseVersion !== 0 && semver.gte(this.sequelize.options.databaseVersion, '8.3.0');
if (dataTypes.HSTORE.types.postgres.oids.length === 0 && supportedVersion) {
query += 'SELECT typname, oid, typarray FROM pg_type WHERE typtype = \'b\' AND typname IN (\'hstore\', \'geometry\', \'geography\')';
}
return new Promise((resolve, reject) => {
connection.query(query)
.on('error', err => reject(err))
.on('row', row => {
let type;
if (row.typname === 'geometry') {
type = dataTypes.postgres.GEOMETRY;
} else if (row.typname === 'hstore') {
type = dataTypes.postgres.HSTORE;
} else if (row.typname === 'geography'){
type = dataTypes.postgres.GEOGRAPHY;
}
type.types.postgres.oids.push(row.oid);
type.types.postgres.array_oids.push(row.typarray);
this._refreshTypeParser(type);
})
.on('end', () => resolve());
});
});
}
disconnect(connection) {
return new Promise(resolve => {
connection.end();
resolve();
});
}
validate(connection) {
return connection._invalid === undefined;
}
}
Utils._.extend(ConnectionManager.prototype, AbstractConnectionManager.prototype);
module.exports = ConnectionManager;
module.exports.ConnectionManager = ConnectionManager;
module.exports.default = ConnectionManager;