I lately had Drupal Development Service alternative emigrate content material from a 6 web site to a 8 web site. This was particularly fascinating for me as I hadn’t used 6 earlier than. As you’d count on, there are some main infrastructure modifications between 6 and 8. These variations introduce some migration challenges that I’d wish to share. Drupal Development Service Migrate Drupal 10 module is a superb factor. Drupal Development Service overwhelming majority of node-based content material could be migrated right into a 8 web site with minimal effort, and for Drupal Development Service content material that doesn’t fairly match, there are customized migration sources. A customized migration supply is a small class that may present further information to your migration in Drupal Development Service type of supply fields. Sometimes, a migration will map supply fields to vacation spot fields, anticipating Drupal Development Service fields to exist on each Drupal Development Service supply node sort and vacation spot node sort. We really revealed an in-depth, two-part weblog collection about how we use Migrate to populate websites with content material along side Google Sheets in our personal tasks. In Drupal Development Service following instance, we’re migrating Drupal Development Service worth of content_field_text_author from 6 to field_author in 8. These two fields map one-to-one Drupal 10 Upkeep and Help Service id Drupal 10 Upkeep and Help Service e-book label Drupal 10 Upkeep and Help Service E book migration_group Drupal 10 Upkeep and Help Service d6 deriver Drupal 10 Upkeep and Help Service nodePluginmigrateD6NodeDeriver supply Drupal 10 Upkeep and Help Service key Drupal 10 Upkeep and Help Service migrate goal Drupal 10 Upkeep and Help Service d6 plugin Drupal 10 Upkeep and Help Service d6_node node_type Drupal 10 Upkeep and Help Service e-book course of Drupal 10 Upkeep and Help Service field_author Drupal 10 Upkeep and Help Service content_field_text_author vacation spot Drupal 10 Upkeep and Help Service plugin Drupal 10 Upkeep and Help Service entity Drupal 10 Upkeep and Help Servicenode This area mapping works as a result of content_field_text_author is a desk in Drupal Development Service 6 database and is acknowledged by Drupal Development Service Migrate Drupal 10 module as a area. Everyone seems to be glad. Nonetheless, in 6, it’s attainable for a area to exist solely in Drupal Development Service database desk of Drupal Development Service node sort. These tables appear to be this Drupal 10 Upkeep and Help Service mysql> DESC content_type_book; +—————————-+——————+——+—–+———+——-+ | Discipline | Kind | Null | Key | Default | Additional | +—————————-+——————+——+—–+———+——-+ | vid | int(10) unsigned | NO | PRI | 0 | | | nid | int(10) unsigned | NO | MUL | 0 | | | field_text_issue_value | longtext | YES | | NULL | | +—————————-+——————+——+—–+———+——-+ If we wish to migrate Drupal Development Service content material of field_text_issue_value to 8, we have to use a customized migration supply. Customized migration sources are PHP lessons that stay in Drupal Development Service src/Plugin/migrate/supply listing of your Drupal 10 module. For instance, you will have a PHP file positioned at src/Plugin/migrate/supply/BookNode.php that would supply customized supply fields for a E book content material sort. A easy supply appears to be like like this Drupal 10 Upkeep and Help Service namespace custom_migrate_d6Pluginmigratesource; use nodePluginmigratesourced6Node; /** * @MigrateSource( * id = “d6_book_node”, * ) */ class BookNode extends Node { /** * @inheritdoc */ public operate question() { $question = dad or mum Drupal 10 Upkeep and Help Service Drupal 10 Upkeep and Help Servicequery(); $query->be a part of(‘content_type_book’, ‘e-book’, ‘n.nid = e-book.nid’); $query->addField(‘e-book’, ‘field_text_issue_value’); return $question; } } As you possibly can see, we’re utilizing our migration supply to change Drupal Development Service question Drupal Development Service Migrate Drupal 10 module makes use of to retrieve Drupal Development Service information to be migrated. Our modification extracts Drupal Development Service field_text_issue_value column of Drupal Development Service e-book content material sort desk and gives it to Drupal Development Service migration as a supply area. To make use of this migration supply, we have to make one minor change to alter to our migration. We exchange this Drupal 10 Upkeep and Help Service plugin Drupal 10 Upkeep and Help Service d6_node With this Drupal 10 Upkeep and Help Service plugin Drupal 10 Upkeep and Help Service d6_book_node We do that as a result of our migration supply extends Drupal Development Service customary 6 node migration supply so as to add our customized supply area. Drupal Development Service migration now accommodates two supply fields and appears like this Drupal 10 Upkeep and Help Service id Drupal 10 Upkeep and Help Service e-book label Drupal 10 Upkeep and Help Service E book migration_group Drupal 10 Upkeep and Help Service d6 deriver Drupal 10 Upkeep and Help Service nodePluginmigrateD6NodeDeriver supply Drupal 10 Upkeep and Help Service key Drupal 10 Upkeep and Help Service migrate goal Drupal 10 Upkeep and Help Service d6 plugin Drupal 10 Upkeep and Help Service d6_book_node node_type Drupal 10 Upkeep and Help Service e-book course of Drupal 10 Upkeep and Help Service field_author Drupal 10 Upkeep and Help Service content_field_text_author field_issue Drupal 10 Upkeep and Help Service field_text_issue_value vacation spot Drupal 10 Upkeep and Help Service plugin Drupal 10 Upkeep and Help Service entity Drupal 10 Upkeep and Help Servicenode You’ll discover you are able to do quite a bit with customized migration sources, and that is particularly helpful with legacy variations of the place you’ll should fudge information not less than just a little bit. So if Drupal Development Service Migrate Drupal 10 module isn’t doing it for you, you’ll all the time have Drupal Development Service choice to step in and provides it just a little push. Drupal 10 Growth and Help