# url('repo', repo_name=ID)

        repo_model = RepoModel()

        changed_name = repo_name

        _form = RepoForm(edit=True, old_data={'repo_name':repo_name})()

        try:

            form_result = _form.to_python(dict(request.POST))

            repo_model.update(repo_name, form_result)

            invalidate_cache('get_repo_cached_%s' % repo_name)

            h.flash(_('Repository %s updated successfully' % repo_name),

                    category='success')

            changed_name = form_result['repo_name']

            action_logger(self.rhodecode_user, 'admin_updated_repo',

                              changed_name, '', self.sa)

        except formencode.Invalid, errors:

            c.repo_info = repo_model.get_by_repo_name(repo_name)

            if c.repo_info.stats:

                last_rev = c.repo_info.stats.stat_on_revision

            else:

                last_rev = 0

            c.stats_revision = last_rev

            repo, dbrepo = ScmModel().get(repo_name, retval='repo')

            c.default_user_id = User.by_username('default').user_id

            c.in_public_journal = self.sa.query(UserFollowing)\

                .filter(UserFollowing.user_id == c.default_user_id)\

                .filter(UserFollowing.follows_repository == c.repo_info).scalar()

            if last_rev == 0:

                c.stats_percentage = 0

            else:

                c.stats_percentage = '%.2f' % ((float((last_rev)) /

                                                c.repo_last_rev) * 100)

            c.users_array = repo_model.get_users_js()

            c.users_groups_array = repo_model.get_users_groups_js()

            errors.value.update({'user':c.repo_info.user.username})

            return htmlfill.render(

                render('admin/repos/repo_edit.html'),

                defaults=errors.value,

                errors=errors.error_dict or {},

                prefix_error=False,

                encoding="UTF-8")

        except Exception:

        repo_model = RepoModel()

        c.repo_info = repo_model.get_by_repo_name(repo_name)

        if c.repo_info is None:

            h.flash(_('%s repository is not mapped to db perhaps'

                      ' it was created or renamed from the filesystem'

                      ' please run the application again'

                      ' in order to rescan repositories') % repo_name,

                      category='error')

            return redirect(url('repos'))

        c.default_user_id = User.by_username('default').user_id

        c.in_public_journal = self.sa.query(UserFollowing)\

            .filter(UserFollowing.user_id == c.default_user_id)\

            .filter(UserFollowing.follows_repository == c.repo_info).scalar()

        if c.repo_info.stats:

            last_rev = c.repo_info.stats.stat_on_revision

        else:

            last_rev = 0

        c.stats_revision = last_rev

        if last_rev == 0 or c.repo_last_rev == 0:

            c.stats_percentage = 0

        else:

            c.stats_percentage = '%.2f' % ((float((last_rev)) /

                                            c.repo_last_rev) * 100)

        c.users_array = repo_model.get_users_js()

        c.users_groups_array = repo_model.get_users_groups_js()

        defaults = c.repo_info.get_dict()

        #fill owner

        if c.repo_info.user:

            defaults.update({'user':c.repo_info.user.username})

        else:

            replacement_user = self.sa.query(User)\

            .filter(User.admin == True).first().username

            defaults.update({'user':replacement_user})

        #fill repository users

        for p in c.repo_info.repo_to_perm:

            defaults.update({'u_perm_%s' % p.user.username:

class ChangelogController(BaseRepoController):

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def __before__(self):

        super(ChangelogController, self).__before__()

    def index(self):

        limit = 100

        default = 20

        if request.params.get('size'):

            try:

                int_size = int(request.params.get('size'))

            except ValueError:

                int_size = default

            int_size = int_size if int_size <= limit else limit

            c.size = int_size

            session['changelog_size'] = c.size

            session.save()

        else:

            c.size = int(session.get('changelog_size', default))

        p = int(request.params.get('page', 1))

        c.total_cs = len(c.rhodecode_repo)

        c.pagination = RepoPage(c.rhodecode_repo, page=p, item_count=c.total_cs,

        self._graph(c.rhodecode_repo, c.size, p)

        return render('changelog/changelog.html')

    def _graph(self, repo, size, p):

        """

        Generates a DAG graph for mercurial

        :param repo: repo instance

        :param size: number of commits to show

        :param p: page number

        """

        if not repo.revisions or repo.alias == 'git':

            c.jsdata = json.dumps([])

            return

        revcount = min(repo.size, size)

        offset = 1 if p == 1 else  ((p - 1) * revcount + 1)

        rev_start = repo.revisions.index(repo.revisions[(-1 * offset)])

        rev_end = max(0, rev_start - revcount)

        dag = graph_rev(repo._repo, rev_start, rev_end)