Support trigger actions for dropdown fields in preview mode

[mjauvin]

When in preview mode, if a dropdown field is used as another field's trigger, the trigger won't happen because the js code does not find the trigger field.

Fix #845

[bennothommo]

I'm curious as to how this fixes the issue. AFAICT, no trigger attributes are being populated here and in some other field types when in preview mode, so there will be a disconnect between triggers in preview vs. create/update.

[mjauvin]

The trigger js code is searching for the trigger field and its value and couldn't find it without this hidden input element.

[mjauvin]

I'm curious as to how this fixes the issue. AFAICT, no trigger attributes are being populated here and in some other field types when in preview mode, so there will be a disconnect between triggers in preview vs. create/update.

Those trigger attributes you refer to are the element BEING triggered, not the trigger field itself.

[bennothommo]

Alright, fair enough, this fixes dropdowns. But I'd say the issue will remain for other field types (ie. the text/email/number/etc. fields where the input is swapped with a span). So on face value, I don't think this entirely fixes the linked issue.

[mjauvin]

The trigger attributes are added to the field container, I think this is what you're looking for.

This is done in the field_container partial

[mjauvin]

Alright, fair enough, this fixes dropdowns. But I'd say the issue will remain for other field types (ie. the text/email/number/etc. fields where the input is swapped with a span). So on face value, I don't think this entirely fixes the linked issue.

I see your point though, if the trigger field was a text field, that would still be broken, most likely. I'll revisit this for the other field types as well. But dropdown and switch/checkboxes are the most common trigger field types.