04. For Developers and Site Builders - backdrop-contrib/og GitHub Wiki

Views integration: There are some default views that ship with the module. Follow those views configuration in terms of best practice (e.g. adding a relationship to the group-membership entity instead of querying directly the group-audience field).
Token integration: Unlike D7 Backdrop provides a large number of tokens in core. Enable the Entity Tokens module for additional ones (especially if you want to use any og_membership tokens).
Rules integration: Organic groups is shipped with Rules configurations that allow simple notification and other tasks. They are disabled by default. You can clone and change their behavior.
You may craft your own URLs to prepopulate the group-audience fields (e.g. node/add/post?field_group_audience=1 to prepopulate reference to node ID 1), using the "Entity reference prepopulate" module https://backdropcms.org/project/entityreference_prepopulate and configuring the correct settings in the field UI. Read more about it in Entity reference prepopulate's README file.
Furthermore, when Entity reference prepopulate module is enabled the node "create" permissions will be enabled even for non-members. In order to allow a non member to create a node to a group they don't belong to, you should craft the URL in the same way. OG will recognize this situation and add the group as a valid option under the "My groups" widget.
When deleting groups, it is possible to delete orphan group-content, or move it under another group. In order to do it in a scalable way, enable the "Use queue" option, and process it using for example: drush queue-run og_membership_orphans (TO BE TESTED)