Re: [PROJXP] [PATCH] Users can comment on epic stories. #168

Added a new migration that creates the mapping table for joining epics to their messages. Added a business rule, Epic.can_comment?. It only returns true if the given user has a role in one of the products owned by the epic's project. To support this a new business rule, Project.is_member?, was added that returns whether a user is a member of project's product teams. When an epic is shown, an empty comment is created but not saved if the user is allowed to post comments. On the epic detail page a comment form is shown. Added a new route, comment_epic_path, for posting comments. Added the supporting action, EpicsController.comment, to receive and process the comment. Signed-off-by: Darryl L. Pierce <mcpierce(a)gmail.com&gt; ---