Roadsend PHP SiteManager

While this is technically true ("all filters run regardless of the 'required' setting"), I am finding it to be not quite the complete story.

I have a form in which I would would like to make one field "conditionally" required. That is, field X is required only if the content of field Y is set some way.

The specific example is a list of members whose member_type field is either full_member or mailing_list_only. For a full_member, we require a name, but not for a mailing_list_only member.

My first attempt at this was to simply set required=false for the name field and then add a function filter to the name field that implements my conditional checks.

But I found that the filter would not run on the empty field. Further investigation showed that SM_formEntity::applyFilters specifically prevents a filter from running on a non-required field whose data is empty. While this probably makes sense in general, it completely whacks my approach.

So I guess the general question is: how would you implement this kind of "conditionally required" behavior?

I suppose that rather than adding the filter to the
name field, I could add it to the member_type field. But that seems like a bit of a hack. After all, I want to direct the user to address the missing data in the name field, not the correct content in the member_type field.

Any ideas would be greatly appreciated.

Thanks and regards,

David