configure task to run migrations automatically before app run

[carloslenondavis]

La intención es poder correr las migraciones pendientes antes de levantar el server.

se puede usar el paquete umzug para esto, este paquete verifica que los modelos sequelizes esten bien y luego ejecuta las migraciones que no estan pendientes.

Algo asi

const umz = new umzug({
    storage: 'sequelize',
    storageOptions: {
        sequelize: sequelize
    },
    migrations: {
        params: [
            sequelize.getQueryInterface(),
            sequelize.constructor,
            function() {
                throw new Error('Migration tried to use old style "done" callback. Please upgrade to "umzug" and return a promise instead.');
            }
        ],
        path: './src/db/migrations',
        pattern: /^\d+[\w-]+\.js$/
    },
    logging: function() {
        console.log.apply(null, arguments);
    },
});

umz.pending().then(function(migrations) { 
    migrations = migrations.map(function (migration) {
        return migration.file.replace(/\.js$/, '');
    });

    umz.execute({
        migrations: migrations,
        method: 'up'
    }).then(function(migrations) {
        startApp(port);
    });
});

function startApp(port) {
    app.listen(port, function(){
        console.log('|o| yupiii!! flowdu api is now listening on port |o|', port);
    });
}