<!DOCTYPE html> <html class="no-js" lang="en-GB"> <head> <title>Simplifying Drupal Migrations with xautoload | Oliver Davies</title> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta property="og:url" content="https://www.oliverdavies.uk/blog/2016/05/03/simplifying-drupal-migrations-with-xautoload"> <meta property="og:title" content="Simplifying Drupal Migrations with xautoload"/> <meta property="og:image" content="https://www.oliverdavies.uk/assets/images/me-precedent.jpg"/> <meta property="og:image:height" content="327"/> <meta property="og:image:type" content="image/jpg"> <meta property="og:image:width" content="327"/> <link rel="stylesheet" href="https://www.oliverdavies.uk/assets/css/main.css"> <link rel="stylesheet" href="https://www.oliverdavies.uk/assets/css/blog-post.css"> <link rel="apple-touch-icon" href="/assets/images/me-precedent.jpg?s=57" sizes="57x57"> <link rel="apple-touch-icon" href="/assets/images/me-precedent.jpg?s=114" sizes="114x114"> <link rel="apple-touch-icon" href="/assets/images/me-precedent.jpg?s=72" sizes="72x72"> <link rel="apple-touch-icon" href="/assets/images/me-precedent.jpg?s=144" sizes="144x144"> <link rel="apple-touch-icon" href="/assets/images/me-precedent.jpg?s=60" sizes="60x60"> <link rel="apple-touch-icon" href="/assets/images/me-precedent.jpg?s=120" sizes="120x120"> <link rel="apple-touch-icon" href="/assets/images/me-precedent.jpg?s=76" sizes="76x76"> <link rel="apple-touch-icon" href="/assets/images/me-precedent.jpg?s=152" sizes="152x152"> <link rel="icon" href="/assets/images/me-precedent.jpg?s=160" sizes="160x160"> <link rel="icon" href="/assets/images/me-precedent.jpg?s=96" sizes="96x96"> <link rel="icon" href="/assets/images/me-precedent.jpg?s=32" sizes="32x32"> <link rel="icon" href="/assets/images/me-precedent.jpg?s=16" sizes="16x16"> </head> <body class=""> <nav class="navbar navbar-inverse navbar-fixed-top"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="https://www.oliverdavies.uk/">Oliver Davies</a> </div> <div id="navbar" class="collapse navbar-collapse" role="navigation"> <ul class="nav navbar-nav"> <li class=""> <a href="/">About</a> </li> <li class=""> <a href="/experience">Experience</a> </li> <li class=""> <a href="/testimonials">Testimonials</a> </li> <li class=""> <a href="/talks">Talks</a> </li> <li class="active"> <a href="/blog">Blog</a> </li> <li class=""> <a href="/contact">Contact</a> </li> </ul> </div> </div> </nav> <div class="container"> <div class="row"> <main class="col-md-9"> <h1>Simplifying Drupal Migrations with xautoload</h1> <p class="posted text-light">3rd May 2016</p> <h2 id="what-is-xautoload%3F">What is xautoload?</h2> <p><a href="https://www.drupal.org/project/xautoload">xautoload</a> is a Drupal module that enables the autoloading of PHP classes, in the same way that you would do so in a <a href="http://getcomposer.org">Composer</a> based project such as Drupal 8 or Symfony.</p> <p>It supports both the <a href="http://www.php-fig.org/psr/psr-0/">PSR-0</a> and <a href="http://www.php-fig.org/psr/psr-4/">PSR-4</a> standards, as well as providing a wildcard syntax for Drupal’s <code>file[]</code> syntax in .info files.</p> <p>To use it, download and enable it from Drupal.org as you would for any other module, and then add it as a dependency within your module. The xautoload project page suggests including a minimum version in this format:</p> <pre><code class="language-ini">dependencies[] = xautoload (>= 7.x-5.0) </code></pre> <p>This will ensure that the version of xautoload is 7.x-5.0 or newer.</p> <h2 id="how-to-use-it">How to use it</h2> <h3 id="wildcard-syntax-for-.info-files">Wildcard syntax for .info files</h3> <p>Here is an example .info file for a migrate module.</p> <pre><code class="language-ini">; foo_migrate.info name = Foo Migration core = 7.x package = Foo files[] = includes/user.inc files[] = includes/nodes/article.inc files[] = includes/nodes/page.inc </code></pre> <p>In this example, each custom migration class is stored in it’s own file within the <code>includes</code> directory, and each class needs to be loaded separately using the <code>files[] = filename</code> syntax.</p> <p>One thing that the xautoload module does to enable for the use of wildcards within this syntax. By using wildcards, the module file can be simplified as follows:</p> <pre><code class="language-ini">files[] = includes/**/*.inc </code></pre> <p>This will load any .inc files within the <code>includes</code> directory as well as any sub-directories, like 'node' in the original example.</p> <p>This means that any new migration classes that are added will be automatically loaded, so you don’t need to declare each include separately within foo_migrate.info again. The great thing about this approach is that it works with the existing directory and file structure.</p> <h3 id="use-the-psr-4-structure">Use the PSR-4 structure</h3> <p>If you want to use the <a href="http://www.php-fig.org/psr/psr-4/">PSR-4</a> approach, you can do that too.</p> <p>In order to do so, you’ll need to complete the following steps:</p> <ol> <li>Rename the <code>includes</code> directory to <code>src</code>.</li> <li>Ensure that there is one PHP class per file, and that the file extension is <code>.php</code> rather than <code>.inc</code>.</li> <li>Ensure that the name of the file matches the name of the class - <code>FooArticleNodeMigration</code> would be in a file called <code>FooArticleNodeMigration.php</code>.</li> <li>Add a namespace to each PHP file. This uses the same format as Drupal 8, including the machine name of the module. For example, <code>Drupal\foo_migrate</code>. <ul> <li>If the class is within a sub-directory, then this will also need to be included within the namespace - e.g. <code>Drupal\foo_migrate\Node</code>.</li> <li>You’ll also need to import any class names that you are referencing, including class names that are you extending, by adding <code>use</code> statements at the top of the file. You may be able to prefix it with <code>\</code> instead (e.g. <code>\DrupalNode6Migration</code>), but I prefer to use imports.</li> </ul></li> </ol> <p>Now your class may look something like this:</p> <pre><code class="language-php"><?php namespace Drupal\foo_migrate\Node; use DrupalNode6Migration; class FooArticleNodeMigration extends DrupalNode6Migration { ... } </code></pre> <p>With these steps completed, any imports within your .info file can be removed as they are no longer needed and any classes will be loaded automatically.</p> <p>Within <code>foo_migrate.migrate.inc</code>, I can now reference any class names using their full namespace:</p> <pre><code class="language-php">$node_arguments['ArticleNode'] = array( 'class_name' => 'Drupal\foo_migrate\Node\FooArticleNodeMigration', 'source_type' => 'story', 'destination_type' => 'article', ); </code></pre> <h2 id="resources">Resources</h2> <ul> <li><a href="https://www.drupal.org/project/xautoload">xautoload module</a></li> <li><a href="https://www.drupal.org/project/migrate">migrate module</a></li> <li><a href="https://www.drupal.org/project/migrate_d2d">migrate_d2d module</a></li> <li><a href="http://www.php-fig.org/psr/psr-0/">PSR-0</a></li> <li><a href="http://www.php-fig.org/psr/psr-4/">PSR-4</a></li> </ul> <p class="tags"> Tags: <a href="https://www.oliverdavies.uk/blog/tags/autoloading">autoloading</a>, <a href="https://www.oliverdavies.uk/blog/tags/drupal">drupal</a>, <a href="https://www.oliverdavies.uk/blog/tags/drupal-planet">drupal-planet</a>, <a href="https://www.oliverdavies.uk/blog/tags/drupal-7">drupal-7</a>, <a href="https://www.oliverdavies.uk/blog/tags/php">php</a> </p> <div class="post-pager is-flex"> <div class="is-half"> <a href="/blog/2016/02/15/announcing-the-drupal-vm-generator"> « Announcing the Drupal VM Generator </a> </div> <div class="is-half text-right"> <a href="/blog/2016/07/15/building-gmail-filters-with-php"> Building Gmail Filters with PHP » </a> </div> </div> <div class="about-author"> <h2>About the Author</h2> <img src="//www.oliverdavies.uk/assets/images/me-precedent.jpg" alt="Picture of Oliver" class="img-circle"> <p>Oliver Davies is a Web Developer, System Administrator and Drupal specialist based in the UK. He is a Senior Developer at <a href="https://microserve.io">Microserve</a> and also provides freelance consultancy services for Drupal websites, PHP applications and Linux servers.</p> </div> </main> <div class="col-md-3"> <div class="panel badges text-center"> <a class="badge--da-member" href="https://assoc.drupal.org/membership" title="I’m a Drupal Association member."> <img src="//www.oliverdavies.uk/assets/images/da-individual-member.png" alt="Drupal Association Individual Member" width="152" > </a> <a href="http://drupalcores.com/#opdavies"> <img alt="I built Drupal 8 with hand holding a wrench on blue background" src="//www.oliverdavies.uk/assets/images/drupal-8.jpg" /> </a> <img src="//www.oliverdavies.uk/assets/images/badges/acquia-certified-developer-drupal-8.png" alt="Acquia Certified Developer - Drupal 8 Exam Badge" height="147" width="147" /> <a href="http://conference.phpnw.org.uk/phpnw17"> <img src="//www.oliverdavies.uk/assets/images/badges/phpnw17.png" alt=""> </a> </div> <div class="availability panel panel-default"> <div class="panel-heading">Availability</div> <div class="panel-body"> <p> <i class="fa fa-thumbs-o-up text-warning"></i> Currently have limited part-time capacity </p> <p> <i class="fa fa-thumbs-o-down text-danger"></i> Currently no spare full-time capacity. </p> </div> </div> <div class="latest-posts panel panel-default"> <div class="latest-posts__heading panel-heading">Latest blog posts</div> <ul class="list-group"> <li class="post list-group-item"> <span class="post__title"> <a href="/blog/2017/06/09/introducing-the-drupal-meetups-twitterbot"> Introducing the Drupal Meetups Twitterbot </a> </span> - <span class="post__date">9th June, 2017</span> </li> <li class="post list-group-item"> <span class="post__title"> <a href="/blog/2017/05/20/turning-drupal-module-into-feature"> Turning Your Custom Drupal Module into a Feature </a> </span> - <span class="post__date">20th May, 2017</span> </li> <li class="post list-group-item"> <span class="post__title"> <a href="/blog/2017/05/15/drupalcamp-bristol-early-bird-tickets-sessions-sponsors"> DrupalCamp Bristol 2017 - Early Bird Tickets, Call for Sessions, Sponsors </a> </span> - <span class="post__date">15th May, 2017</span> </li> </ul> </div> </div> </div> </div> <footer class="container"> <p class="copyright"> © 2010-2017 Oliver Davies. 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