Tell us what you are trying to do?
I would like to have a custom field type added, or perhaps guidance on how to write an addon that would do this—to have a post_object/post field type with multi-select to match the offering from ACF and MetaBox. I believe that this is distinct from the Post Relationship field/functionality already in Toolset. There may be cases where a single Post has multiple Post Object custom fields.
Is there any documentation on how to extend Toolset? APIs and functions that I might be able to hook into if I do this on my own?
Is there a similar example that we can see?
ACF Post Object: hidden link
MetaBox Post: hidden link
Hi,
Welcome to Toolset support. There is no such feature and Toolset does not provide API to create a new custom field type.
Toolset Types API is here:
https://toolset.com/documentation/customizing-sites-using-php/functions/
But for what you want to achieve you will need to delve into Toolset core code. You can hire a developer for that:
https://toolset.com/contractors/
Thanks.
