Role-based issue custom field visibility (#5037).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12012 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/role.rb

@@ -52,6 +52,7 @@ class Role < ActiveRecord::Base
       WorkflowRule.copy(nil, source_role, nil, proxy_association.owner)
     end
   end
+  has_and_belongs_to_many :custom_fields, :join_table => "#{table_name_prefix}custom_fields_roles#{table_name_suffix}", :foreign_key => "role_id"
 
   has_many :member_roles, :dependent => :destroy
   has_many :members, :through => :member_roles