Migrating Drupal 7 Field Collections to Drupal 10 Paragraphs and Custom Process Plugins

Mauricio Dinarte, in an article published by Tag1 Consulting, discusses the process of migrating Drupal 7 field collections to Drupal 10 paragraphs, focusing on data transformation and integration challenges. The article outlines steps to migrate content, including determining appropriate AUTO_INCREMENT values for paragraph entities and configuring the high water property to ensure data consistency. The migration process involves creating paragraph entities, updating entity reference revision fields, and utilizing the paragraphs module’s automated upgrade path to facilitate content transfer. The article also covers the use of SQL queries to verify data migration and highlights the importance of establishing relationships between paragraphs and host entities by updating the user migration. Additionally, the article introduces the creation of custom process plugins to combine multiple Drupal 7 fields into a single multi-value field in Drupal 10. Practical examples and code snippets are provided to guide developers through the migration process, with an emphasis on maintaining best practices and leveraging Drupal’s migration tools effectively. The next installment will explore writing custom source plugins and handling entity revision fields in the context of media migrations.