models.py

from openerp import fields, api, models
from lxml import etree
from lxml.builder import E
from openerp.tools.translate import _
from openerp.addons.base.res.res_users import name_boolean_group, name_selection_groups


class GroupsView(models.Model):
    _inherit = 'res.groups'
    is_custom_group = fields.Boolean("Custom Group", help="show group at the top of Access Rights tab in user form")

    @api.model
    def _update_user_groups_view(self):
        # call super to make module compatible with other modules (e.g. access_restricted)
        super(GroupsView, self)._update_user_groups_view()

        if self._context.get('install_mode'):
            # use installation/admin language for translatable names in the view
            user_context = self.env['res.users'].context_get()
            self = self.with_context(**user_context)

        # We have to try-catch this, because at first init the view does not
        # exist but we are already creating some basic groups.
        view = self.env.ref('base.user_groups_view', raise_if_not_found=False)
        if view and view.exists() and view._name == 'ir.ui.view':
            group_no_one = view.env.ref('base.group_no_one')
            xml1, xml2 = [], []
            xml1.append(E.separator(string=_('Application'), colspan="2"))

            xml3 = []
            xml3.append(E.separator(string=_('Custom User Groups'), colspan="4"))

            for app, kind, gs in self.get_groups_by_application():
                xml = None
                custom = False
                if kind == 'selection' and any([g.is_custom_group for g in gs]) or all([g.is_custom_group for g in gs]):
                    xml = xml3
                    custom = True

                # hide groups in category 'Hidden' (except to group_no_one)
                attrs = {'groups': 'base.group_no_one'} if app and (app.xml_id == 'base.module_category_hidden' or app.xml_id == 'base.module_category_extra') and not custom else {}

                if kind == 'selection':
                    xml = xml or xml1
                    # application name with a selection field
                    field_name = name_selection_groups(map(int, gs))
                    xml.append(E.field(name=field_name, **attrs))
                    xml.append(E.newline())
                else:
                    xml = xml or xml2
                    # application separator with boolean fields
                    app_name = app and app.name or _('Other')
                    if not custom:
                        xml.append(E.separator(string=app_name, colspan="4", **attrs))
                    for g in gs:
                        field_name = name_boolean_group(g.id)
                        if g == group_no_one:
                            # make the group_no_one invisible in the form view
                            xml.append(E.field(name=field_name, invisible="1", **attrs))
                        else:
                            xml.append(E.field(name=field_name, **attrs))

            xml2.append({'class': "o_label_nowrap"})
            xml = E.field(E.group(*(xml3), col="2"), E.group(*(xml2), col="4"), E.group(*(xml1), col="2"), name="groups_id", position="replace")
            xml.addprevious(etree.Comment("GENERATED AUTOMATICALLY BY GROUPS"))
            xml_content = etree.tostring(xml, pretty_print=True, xml_declaration=True, encoding="utf-8")
            view.write({'arch': xml_content})
        return True