category='error')

            log.error(traceback.format_exc())

            raise HTTPFound(location=url('pullrequest_home', repo_name=repo_name))

        raise HTTPFound(location=pull_request.url())

    def create_update(self, old_pull_request, updaterev, title, description, reviewers_ids):

        org_repo = RepoModel()._get_repo(old_pull_request.org_repo.repo_name)

        org_ref_type, org_ref_name, org_rev = old_pull_request.org_ref.split(':')

        new_org_rev = self._get_ref_rev(org_repo, 'rev', updaterev)

        other_repo = RepoModel()._get_repo(old_pull_request.other_repo.repo_name)

        old_revisions = set(old_pull_request.revisions)

        revisions = [cs.raw_id for cs in cs_ranges]

        new_revisions = [r for r in revisions if r not in old_revisions]

        lost = old_revisions.difference(revisions)

                 (h.canonical_url('pullrequest_show', repo_name=old_pull_request.other_repo.repo_name,

                      pull_request_id=old_pull_request.pull_request_id),

                  old_pull_request.title)]

        if lost:

            for r in old_pull_request.revisions:

                if r in lost:

                    rev_desc = org_repo.get_changeset(r).message.split('\n')[0]

                    infos.append('  %s "%s"' % (h.short_id(r), rev_desc))

        if new_revisions:

            for r in reversed(revisions):

                if r in new_revisions:

                    rev_desc = org_repo.get_changeset(r).message.split('\n')[0]

                    infos.append('  %s %s' % (h.short_id(r), h.shorter(rev_desc, 80)))

            if ancestor_rev == other_rev:

                infos.append(h.canonical_url('compare_url',

                                 repo_name=org_repo.repo_name, # other_repo is always same as repo_name

                                 org_ref_type='rev', org_ref_name=h.short_id(org_rev), # use old org_rev as base

                                 other_ref_type='rev', other_ref_name=h.short_id(new_org_rev),

                                 )) # note: linear diff, merge or not doesn't matter

            else:

        else:

           # TODO: fail?

        # hack: ancestor_rev is not an other_ref but we want to show the

        # requested destination and have the exact ancestor

        new_other_ref = '%s:%s:%s' % (other_ref_type, other_ref_name, ancestor_rev)

        new_org_ref = '%s:%s:%s' % (org_ref_type, org_ref_name, new_org_rev)

            title, old_v = re.match(r'(.*)\(v(\d+)\)\s*$', title).groups()

            v = int(old_v) + 1

        except (AttributeError, ValueError):

            v = 2

        title = '%s (v%s)' % (title.strip(), v)

        descriptions = description.replace('\r\n', '\n').split('\n-- \n', 1)

        description = descriptions[0].strip() + '\n\n-- \n' + '\n'.join(infos)

        if len(descriptions) > 1:

            description += '\n\n' + descriptions[1].strip()

        try:

            h.flash(_('Error occurred while creating pull request'),

                    category='error')

            log.error(traceback.format_exc())

            raise HTTPFound(location=old_pull_request.url())

        ChangesetCommentsModel().create(

            repo=old_pull_request.other_repo.repo_id,

            user=c.authuser.user_id,

            pull_request=old_pull_request.pull_request_id,

            closing_pr=True)

        PullRequestModel().close_pull_request(old_pull_request.pull_request_id)

        Session().commit()

                category='success')

        raise HTTPFound(location=pull_request.url())

    # pullrequest_post for PR editing

    @LoginRequired()

                        show = set(hgrepo.revs('::%ld & !::parents(%s) & !::%s',

                                               avail_revs, revs[0], targethead))

                        c.update_msg = _('The following changes are available on %s:') % c.cs_branch_name

                    else:

                        show = set()

                        avail_revs = set() # drop revs[0]

                    # TODO: handle branch heads that not are tip-most

                    brevs = org_scm_instance._repo.revs('%s - %ld - %s', c.cs_branch_name, avail_revs, revs[0])

                    if brevs:

                        # also show changesets that are on branch but neither ancestors nor descendants

                        show.update(org_scm_instance._repo.revs('::%ld - ::%ld - ::%s', brevs, avail_revs, c.a_branch_name))

                            h.short_id(org_scm_instance.get_changeset((max(brevs))).raw_id))

                    avail_show = sorted(show, reverse=True)

            elif org_scm_instance.alias == 'git':

                c.cs_repo.scm_instance.get_changeset(c.cs_rev) # check it exists - raise ChangesetDoesNotExistError if not

        except ChangesetDoesNotExistError:

            c.update_msg = _('Error: revision %s was not found. Please create a new pull request!') % c.cs_rev

        c.avail_revs = avail_revs

        c.avail_cs = [org_scm_instance.get_changeset(r) for r in avail_show]

        c.avail_jsdata = json.dumps(graph_data(org_scm_instance, avail_show))

               <div id="owner_completion_container"></div>

          </div>

        </div>

        <div class="field">

            <div class="label-summary">

            </div>

            <div class="input">

              <div class="msg-div">${c.update_msg}</div>

              %if c.avail_revs:

              <div id="updaterevs" style="max-height:200px; overflow-y:auto; overflow-x:hidden; margin-bottom: 10px; padding: 1px 0">

                <div style="height:0">

                        </td>

                      %endif

                    </tr>

                  %endfor

                </table>

              </div>

              %endif

              <div class="msg-div">${c.update_msg_other}</div>

            </div>

        </div>

      </div>

    </div>

    </div>

    <div class="form" style="clear:both">

      <div class="fields">

        %if editable:

          <div class="buttons">

            ${h.submit('pr-form-save',_('Save Changes'),class_="btn btn-small")}

            ${h.reset('pr-form-reset',_('Cancel Changes'),class_="btn btn-small")}

          </div>

        %endif

      </div>

    </div>

  ${h.end_form()}