The 2026 Drupal Business Survey is open. Your response will help shape the future of the Drupal business ecosystem.It would be useful to have the action "remove items in list X from list Y".
This could for example be used if a node has a number of references in a node reference field, and you want to change them if they are no longer referenced. With this action, you could do "old references" minus "updated references", and then run updates on all the nodes that are no longer referenced.
Well, that wasn't really clear. Lucky for me that I will most likely be the one implementing this feature. :-)
| Comment | File | Size | Author |
|---|---|---|---|
| #4 | create-lists-to-diff.txt | 2.34 KB | mitchell |
| #4 | filter-list-items.txt | 719 bytes | mitchell |
Comments
Comment #2
itangalo commentedChanging title back. Damn spammer.
Comment #3
mitchell commentedThis could be added to Rules. Maybe in #1540634: Calculate a value: support strings, lists, & files?
Comment #4
mitchell commentedI'm pretty sure you and fago, #1391840: Action: "Filter list items" based upon any condition(s), are talking about a new action, but it would also (conceivably) be possible to include a component built on list_contains in a loop to construct the desired output.
This was a simple try at getting that logic working with "Remove the list of letters in list2 from the list of letters in list1", but I didn't nail it yet.
Thoughts?