Hi, how its possible to add to MetaBox (or CustomPostType or CustomModel) Select dropdown field to choose values from another CustomModel (standalone DB table) and store selection by ID?
For example create new MetaBox "Cars" and directory "Fuel" - which your MetaField can get values from table 'Fuel" at dashboard "Cars" editing?
The custom model does not work with the post field to display a dropdown field to choose a model and save its ID. You will need to use the select field and create a custom function to generate options with a list of models.
Please read more about the pros and cons of the custom model in the documentation https://docs.metabox.io/extensions/mb-custom-table/#custom-models