php-flarum/migrations/2015_02_24_000000_create_permissions_table.php

<?php

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreatePermissionsTable extends Migration {

	/**
	 * Run the migrations.
	 *
	 * @return void
	 */
	public function up()
	{
		Schema::create('permissions', function($table)
		{
			$table->integer('group_id')->unsigned();
			$table->string('permission', 100);
			$table->primary(['group_id', 'permission']);
		});
	}

	/**
	 * Reverse the migrations.
	 *
	 * @return void
	 */
	public function down()
	{
		Schema::drop('permissions');
	}

}