Documentation Level: 
Introduction
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No known problems

There are some Drupal 7 modules that do not have a straightforward upgrade path into Backdrop. These fall into three categories:

  1. Simplified Backdrop core modules (supplemental contrib modules available)
  2. Available modules with recommended alternatives
  3. Unavailable modules with comparable alternatives

A list of modules and their recommended replacements and handling is provided below.  

If you would like to suggest additions to this list, please open an issue in the documentation issue queue.

Simplified Backdrop core modules (supplemental contrib modules available)

There are some Drupal 7 modules that were simplified when they were moved into Backdrop core. Contrib modules have been created to preserve the the functionality that was not included in core. 

Entity API (Backdrop core module)

The Drupal 7 Entity API contirb module (machine name: entity) contained functionality that has been split up in Backdrop. Most of it was moved into Backdrop core in a module also named entity, but the remainder of the Entity API functionality now resides in several suplemental contrib modules:

Backdrop versions of several Drupal 7 modules require this additional functionality. These modules may require special handling, for example, the installation of Drupal 7 "stub" modules during the Preparation phase of upgrading. Modules that require such special handling include:

Please see the README files for the respective Backdrop projects for details of the special handling.

Date (Backdrop core module)

The Drupal 7 Date contirb module (machine name date) contained functionality that has been split up in Backdrop. Most of it was moved into Backdrop core in a module also named date, but the repeating dates functionality is now available in either of the contrib modules:

Available modules with recommended alternatives

These are some modules that exist for both Drupal 7 and Backdrop, but we recommend an alternative instead of the original. Examples include:

  • Colorbox: There is a Backdrop version of Colorbox module, but a recommended replacement is Featherlight.

Unavailable modules with comparable alternatives

These are some modules that do not exist (yet) for Backdrop, and the community has adopted an alternative. Examples include:

  • Commerce: Both the Ubercart module is primarily being used instead of Commerce, but we do have a development version of the commerce module available. It is not actively maintained.
  • Field collection: Both the Paragraphs module and the Multifield module are being used instead of field collection.
  • Workbench Moderation: The backdrop version of the workbench_moderation module is named Content Moderation.

For more information about specific modules for your own Drupal 7 site, please run the Backdrop Upgrade Status module.