I have no plans to support third-party system in this way. Search/Filter is coming to the plugin, but it will take time.

As for bbPress, I have GD Power Search Pro/Lite for bbPress for setting up advanced search for the forums. And, it can be expanded with meta fields. Problem is that one metabox can be used for one forum, and different metabox for other forums, so using single form to search multiple forums is not possible or practicle.

If anyone has suggestion on how the metabox based search/filter should work in forums, I am open to suggestions. So far, users asked for the features, but no one really knows how it should look or work. Implementing code to search is easy, having good interface and logic for it is something I don’t have now, and I have not seen anyone offering some good proposal on how to do.

But other idea you could create a plug-in for using metabox.io in bbpress. Loot at Metabox forum, it is one of the most wanted feature. Metabox can already work with bbpress but it requires specific template.

Hi,

1. This is planned for one of the future versions, but I don’t know when that will happen. Version 6.0 includes a lot of changes already that are important to the way the plugin works, and front-end search and filter based on metadata would take a lot of time, and I want to release the plugin soon. I still don’t know how to create a search and filter to be a good feature. Other plugins that do this are mostly doing that very badly, and I want to do this right, so it will take time.

2. I didn’t quite understand everything in your comment here, but if you are referring to connected dropdowns (select value in one, another one shows with values related to the first selection, and so on), that is currently not in the plans. I can’t even see how the interface for setting up the field would look like and work and make it usable.

Milan