Subprojects inherits parent projects members (can be disabled in Admin -> Settings -> Projects).

Eg. if B is a subproject of A, a user with a role on A will automatically have the same role on B. It can be overridden by assigning a different role manually to this user on B.

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@1054 e93f8b46-1217-0410-a6f0-8f06a7374b81

project_inheritance/app/models/user.rb

@@ -182,6 +182,7 @@ class User < ActiveRecord::Base
     if logged?
       # Find project membership
       membership = memberships.detect {|m| m.project_id == project.id}
+      membership ||= memberships.detect {|m| m.project_id == project.parent_id} if Setting.subprojects_inherit_members?
       if membership
         membership.role
       else