def create(self, text, repo_id, user_id, revision, f_path=None,

               line_no=None):

        """

        Creates new comment for changeset

        :param text:

        :param repo_id:

        :param user_id:

        :param revision:

        :param f_path:

        :param line_no:

        """

        if text:

            repo = Repository.get(repo_id)

            cs = repo.scm_instance.get_changeset(revision)

            desc = cs.message

            author_email = cs.author_email

            comment = ChangesetComment()

            comment.repo = repo

            comment.user_id = user_id

            comment.revision = revision

            comment.text = text

            comment.f_path = f_path

            comment.line_no = line_no

            self.sa.add(comment)

            self.sa.flush()

            # make notification

            line = ''

            if line_no:

                line = _('on line %s') % line_no

            subj = h.link_to('Re commit: %(commit_desc)s %(line)s' % \

                                    {'commit_desc': desc, 'line': line},

                             h.url('changeset_home', repo_name=repo.repo_name,

                                   revision=revision,

                                   anchor='comment-%s' % comment.comment_id,

                                   qualified=True,

                                   )

                             )