plataformatec/simple_form — pull request #403 by JESii (2012-01-07 16:17:13+00:00)
Title: Clarify use of label_method versus text_method with collections 

Added note regarding use of label_method instead of underlying text_method. The underlying collection_selection method for associations supports the text_method option for specifying the value to display in the select box; however, this does not work in simple_form, even though the documentation says that all other options are passed to the underlying method. In this case, you must use label_method.