:param request: :class:`django.http.QueryDict`
:param obj_type: :attr:`.PLMObject.type`
:type obj_type: str
:param obj_ref: :attr:`.PLMObject.reference`
:type obj_ref: str
:param obj_revi: :attr:`.PLMObject.revision`
:type obj_revi: str
:return: a :class:`django.http.HttpResponse`