project.work tree children work_tree project.work tree work_list project.work tree work_list2 project.work form work_form Works Efforts project.work [('parent', '=', None)] Works Efforts project.work Projects project.work [('parent', '=', None)] Projects project.work [('type', '=', 'project')] Tasks project.work [('type', '=', 'task')] Tasks project.work [('parent', '=', Eval('active_id')), ('type', '=', 'task')] form_relate project.work,-1