Dependent fields in Rules UI Forms? [#1808826]

Hi guys,

I have taken a close look at the API description page at:
https://api.drupal.org/api/rules/rules.api.php/function/hook_rules_actio...

and was wondering whether it would be possible to add any property to declare a dependency between fields in the 'parameter' section, pretty much the same way ctools does for #dependency, used extensively in the views forms, or even the #states Form API attribute:
http://api.drupal.org/api/drupal/developer%21topics%21forms_api_referenc...

Use case is pretty simple here, for example, hide/display a textfield or checkbox if another checkbox is unchecked/checked, for a parameter on a rules action form, for example. Views does that very well for the fields/filters/sorts settings forms, for example.

I would assume this would come as a feature request, but I just wanted to know if anybody would have an idea about that.
Perhaps a work-around, a work in progress, or any idea to share about this issue.

Any comments or feedback on this particular request would be highly appreciated.

Thanks in advance.

Comments

Comment #1

TR CreditAttribution: TR commented 24 December 2018 at 22:31

Component:	Forms Support	» User Interface
Issue summary:	View changes

Comment #2

TR CreditAttribution: TR commented 7 February 2019 at 05:23

Status:

Active

» Fixed

There's some direct support for this in the Rules action definition hook hook_rules_action_info(), using the callbacks key. You can also do this by using hook_form_alter() along with the full power of the Drupal Form API to modify/enhance the forms generated by Rules. Look at rules_action_data_calc_form_alter() for an example, where Ajax is used to modify the options of the data_calc action based on other form selections.

Examples of both way of altering the form may be found in modules/data.rules.inc