Initial Sequelize Migration with existing database.

create-tables.js

// Inspired by http://bulkan-evcimen.com/using_sequelize_migrations_with_an_existing_database
var Promise = require('bluebird');
var fs = Promise.promisifyAll(require('fs'));

module.exports = {
	up: function(migration, DataTypes, done) {
		var db = migration.migrator.sequelize;
		fs.readFileAsync(__dirname + '/initial.sql', {encoding: 'utf8'})
		.then(function(initialSchema) {
			var tables = initialSchema.split(';');
			return db.query('SET FOREIGN_KEY_CHECKS = 0')
			.then(function() {
				// Run create table statements squentially
				// otherwise MySQL randomly complains.
				return Promise.reduce(tables, function(_, sql) {
					if (sql) {
						return db.query(sql);
					}
				}, null);
			}).then(function(){
				return db.query('SET FOREIGN_KEY_CHECKS = 1');
			});
		}).then(done)
		.catch(function(err){
			console.log(err);
		});
	}
	, down: function(migration, DataTypes, done) {
		migration.dropAllTables('SequelizeMeta')
		.then(done)
		.catch(function(err){
			console.log(err);
		});
	}
};