I have RailsAdmin running for my Rails 3 app which has two models - Sale and Merchandise. There's a HABTM relationship between the two. In RailsAdmin, when a sale is added or edited, a list of available merchandises is shown in the usual fashion. However, only the "name" column of the merchandise is shown. I have another column whose value needs to be included for the list to make any sense. How do I add this to the RailsAdmin interface?
I understand that the RailsAdmin docs say that field declarations have access to a bindings hash which contains the current record instance -- but I can't find any examples of how to implement this. Thanks for any help.