Genkgo.Migrations

Library to make migrations easy.

Installation

Requires PHP 8.0 or later. It is installable and autoloadable via Composer as genkgo/migrations.

Quality

To run the unit tests at the command line, issue vendor/bin/phpunit -c phpunit.xml. PHPUnit is required.

This library attempts to comply with PSR-1, PSR-2, and PSR-4. If you notice compliance oversights, please send a patch via pull request.

Getting Started

Create a migration file

Create a migration file, define how to update and undo the changes in your application.

<?php
use Genkgo\Migrations\AbstractMigration;

class migration_2014_11_13_11_55 extends AbstractMigration
{

    public function up()
    {
        // your changes here
    }

    public function down()
    {
        // undo changes here
    }
}

Migrate

The adapter keeps the history of the already executed migrations. The current library comes with a MySQL and Sqlite adapter. To add a new adapter, create one yourself and issue a pull request. Set the adapter, create a new list (from a list of files in a directory) and execute.

<?php
use PDO;
use Genkgo\Migrations\Factory;
use Genkgo\Migrations\Adapters\PdoSqliteAdapter;

$adapter = new PdoSqliteAdapter(new PDO('sqlite::memory:'));
$factory = new Factory($adapter);
$directory = __DIR__.'/migrations';
$list = $this->factory->newListFromDirectory($directory);
$result = $list->migrate();

Inject dependencies

You can inject your dependencies, e.g. some database abstraction layer like in the sample below.

<?php
use PDO;
use Genkgo\Migrations\Factory;
use Genkgo\Migrations\Adapters\PdoSqliteAdapter;
use Vendor\DatabaseAbstractLayer\SchemaGenerator;

$adapter = new PdoSqliteAdapter(new PDO('sqlite::memory:'));
$factory = new Factory($adapter, function ($classname) {
    return new $classname(new SchemaGenerator());
});

And then use it the migration file.

<?php
use Genkgo\Migrations\AbstractMigration;
use Vendor\DatabaseAbstractLayer\SchemaGenerator;

class migration_2014_11_13_11_55 extends AbstractMigration
{
    private $schema;

    public function __construct(SchemaGenerator $schema) {
        $this->schema = $schema;
    }

    public function up()
    {
        // your changes here
    }

    public function down()
    {
        // undo changes here
    }
}

The example below uses auto resolution of Aura.Di.

<?php
use PDO;
use Genkgo\Migrations\Factory;
use Genkgo\Migrations\Adapters\PdoSqliteAdapter;

$adapter = new PdoSqliteAdapter(new PDO('sqlite::memory:'));
$factory = new Factory($adapter, function ($classname) use ($di) {
    return $di->newInstance($classname);
});

Multiple lists

You can have multiple migration lists, e.g. for each plugin one list. Just put the migration files in the right namespace. See example below.

<?php
namespace Vendor\MyPlugin;

use Genkgo\Migrations\AbstractMigration;

class migration_2014_11_13_11_55 extends AbstractMigration
{

    public function up () { }
    public function down () { }

}

And then migrate.

$directory = __DIR__. '/migrations';
$list = $this->factory->newListFromDirectory($directory,'Vendor\\Plugin\\');
$list->migrate();

Contributing

• Found a bug? Please try to solve it yourself first and issue a pull request. If you are not able to fix it, at least give a clear description what goes wrong. We will have a look when there is time.
• Want to see a feature added, issue a pull request and see what happens. You could also file a bug of the missing feature and we can discuss how to implement it.