Have a NESTED_ATTRIBUTES configuration to control what is being shown for HasOne relations

Created by: bo-oz

• What would you like to be able to do? Can you provide some examples?

On the show page of model A, I'd like to show details of model B (A has_one B). Currently administrate fetches the configuration from FORM_ATTRIBUTES, I'd like to have more control by separating this definition into it's own configuration: NESTED_ATTRIBUTES (for instance)

• How could we go about implementing that?

Probably some reconfiguration of the Field::HasOne class

• Can you think of other approaches to the problem?

Create my own custom field to handle this, but it seems to be a valuable addition to the current solution. You could even overwrite NESTED_ATTRIBUTES = FORM_ATTRIBUTES in the Administrate::BaseDashboard for backwards compatibility.