学生身份的编辑

app/models/member.rb

@@ -52,6 +52,9 @@ class Member < ActiveRecord::Base
     ids += member_roles.select {|mr| !mr.inherited_from.nil?}.collect(&:role_id)
 
     new_role_ids = ids - role_ids
+    if (new_role_ids.include?(7) || new_role_ids.include?(9)) && role_ids.include?(10)
+      member_roles.where("role_id = 10").first.update_column('is_current', 0)
+    end
     # Add new roles
     if new_role_ids.include?(7) && new_role_ids.include?(10)
       member_roles << MemberRole.new(:role_id => 7)