I have been reading the Metabox Docs on Custom models and am surprised that it does not list MB Relationships as a compatible extension.
If there is a technical reason for this omission, my suggestion would be an additional field in the MB Relationship table that stores the Post/Model name.
With some accompanying code, this would additionally enable any relationship combination - i.e. between Post-Model, Page-Model or Model-Model.
Currently, the custom model is not compatible with the relationship extension. I will inform the development team to consider implementing it in future updates.
Is this on the roadmap? If so, when do you expect it to release? If not, are there any plans to get it on the roadmap?
Connecting Custom Models using MB Relationships should improve performance over using MB Relationships to connect CPT Posts in the "wp_posts" table that are separate from their CPT Meta Data in a Custom Table. It would also help keep the size of "wp_posts" down for large sites. I would love to see this capability integrated into MB Relationships. Any news on this would be greatly appreciated. Thank you!