FrozenNode/Laravel-Administrator — pull request #218 by neoascetic (2013-07-04 04:59:22+00:00)
Title: Now it is possible to specify a getter in 'field_name' on relationship

When 'options_sort_field' option is specified only (for backward
compability). If it isn't, 'name_field' will be used as column name for
sorting.