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Seven drupal hosting2/1/2024 6 Best laravel Web Hosting Providers [The Ranking For 2023).6 Best SERP Tracking Tools & Softwares For 2023 (Top Picks).10 Signs Your WordPress Site has been hacked badly (by bad guys).25% Off Elementor Pro Coupon Code Discount Official (May 2023).We’ll start writing the class by extending the core File migration process plugin. For more information about the PSR-4 standard with regards to Drupal 8 / 9 development, read this article. Be sure that the directory structure matches that exactly as Drupal 8 uses the PSR-4 standard for PHP autoloading. We’ll name the plugin class file FileByType.php and it will live inside of our custom module in the directory src/Plugin/migrate/source. We are going to be extending the core File migration source plugin to give the ability to filter the source files we want to migrate by file type, which we’ll need later on in order to determine which files will be referenced by which Media entity type. This is the plugin that we will reference in our migration(s) later on. Next up we’ll need to create our custom migration source plugin. This is a minimal module info.yml file in which we include a dependency on the core migrate module. You can name this anything you want - usually, we’d use a project name prefix followed by the name of the module but for this tutorial, we’ll just call the module ‘example_custom_migration’ for simplicity.Įxample_custom_ name: Example Custom Migrationĭescription: Includes a custom migration for files. Creating the custom moduleįirst of all, we’ll need to create a new custom module (if you haven’t already got a custom migration module in place already!). First, we need a migration to migrate the Drupal 7 Files into our Drupal 8 / 9 site as Files, and then we need one or more secondary migrations (one per file/media type) to create Media entities from those now-migrated Files. The process of getting Files migrated as Media entities is a two-step process. However, we want the ability to migrate into Media entities, so read on to see how to accomplish this with a bit of custom code. The core file migration plugin for Drupal 7 to 8 / 9 just provides a migration route for Files to Files, and any auto-generated entity to entity migrations (provided by the migrate_drupal core module) will only support a File reference field to a File reference field. The Core Drupal 8 / 9 migration of files doesn’t automatically allow you to migrate from Files to Media entities. You can then reference this newly created media entity in any other media entity reference fields that allow referencing the same media entity bundles as this field. When you upload a file to a Media entity reference field that has been set to use the 'Media Library' field widget, Drupal will handle importing the file, creating the entry in the file_managed table, creating the Media entity and then referencing the newly created file in the file reference field on the media entity. Internally, a Media entity references a file entity and this process happens automatically for uploads made through the site frontend. This acts as a replacement for the standard core File entity upload field and once you have configured a Media entity reference field on your entity type, it allows you to reference previously uploaded files from a Media library, instead of having to upload a new file every time. This extended the core file functionality and gave the ability to add fields to the file entity, have separate file types, integrate with views and more.Īs of Drupal 8.4.x and above, Drupal Core has the concept of a ‘Media’ entity type that allows you to upload, manage and reuse files and multimedia assets. In Drupal 7 there was a core ‘File’ entity type and on pretty much all of our clients' sites we would also have the contributed module File Entity enabled. One of the more common components of any migration from a previous version of Drupal is the need to migrate files. This article assumes a basic knowledge of the building of custom modules, the Drupal 8 / 9 Migration system, and the processes behind creating customised migrations from a previous version of Drupal.
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