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Before You Begin

This page lists core Drupal and the most significant contributed modules related to upgrading to Drupal 11.

Earlier documentation: Migrating to Drupal 7 from various sources (some of which may still apply to Drupal 11)

Core Migrate Modules

Please refer to the Migrate API overview for technical documentation on core functionality.

Upgrade Using a Web Browser

Before You Begin

Before starting the upgrade, make sure you’ve reviewed the following documentation:

Upgrade Using Drush

Drush is a command-line shell and scripting interface for Drupal. Upgrading to Drupal 8 using Drush is an alternative to using the browser-based UI. It is especially useful for migrating complex sites as it allows migrations to be run individually and rolled back as needed.

Drupal 6 to 8

Aggregator Categories

Drupal 8 no longer has the concept of aggregator categories, so they are not migrated to Drupal 8.

Allowed Protocols

Drupal 8 now stores protocols in the "filter_protocols" container parameter. If you modified the filter_allowed_protocols variable, enter it in the services.yml file.

Create Your Initial Migrations

• Create migrations using drush migrate-upgrade --configure-only as described in the section "Upgrade Using Drush".
• Ensure you have a config/sync directory that will be used in the next step.
• Export the migrations using drush config:export
• Create your own migration module.
• Copy only the YML files you want to use from the config/sync directory to the config/install directory of your new custom module, editing

The core "Migrate Drupal" module in Drupal 8 provides API support for migrating from Drupal to Drupal, and the "Migrate Drupal UI" module offers a simple user interface for upgrading from older versions of Drupal.

Dynamic queries refer to queries that are dynamically created by Drupal, rather than being supplied as an explicit query string. All insert, update, delete, and merge queries must be dynamic. Select queries can be either static or dynamic. Hence, "dynamic query" usually refers to a dynamic Select query.

The Select query builder supports using expressions in the field list. Example expressions include "double the age field," "count of all name fields," and a substring of the title field. Note that many expressions may use SQL functions, and not all SQL functions are standardized across all databases. Module developers must ensure that only expressions compatible with supported databases are used. (See List of functions and operators)