Make column not nullable in a Laravel migration

As of Laravel 5 it's possible to reverse this by passing false as an argument to nullable.

$table->string('foo')->nullable(false)->change();

Prior to Laravel 5, there was no Laravel native way of altering an existing table column using the schema builder. You'd need to use raw queries for this.

However, as of Laravel 5 you can use:

$table->string('foo')->nullable(false)->change();

You must have the dbal dependency prior to running the above command:

composer require doctrine/dbal