public function importarArticulos()
 {
     $reqs = Req::whereBetween('req', $this->arr_rango)->get(['id', 'req', 'estatus']);
     foreach ($reqs as $req) {
         $articulos_legacy = $this->consultarArticulosLegacy($req->req);
         foreach ($articulos_legacy as $art_legacy) {
             if (!empty($art_legacy->oc)) {
                 $oc_id = Oc::whereOc($art_legacy->oc)->pluck('id');
                 if (empty($oc_id)) {
                     $oc_id = 0;
                 }
             } else {
                 $oc_id = 0;
             }
             $articulo = new Articulo();
             $articulo->req_id = $req->id;
             $articulo->articulo = $art_legacy->art . ' ' . $art_legacy->esp;
             $articulo->cantidad = $art_legacy->cantidad;
             $articulo->impuesto = $art_legacy->impuesto;
             $articulo->monto = $art_legacy->monto;
             $articulo->oc_id = $oc_id;
             $articulo->unidad = $art_legacy->unidad;
             $articulo->inventariable = $art_legacy->alta;
             $articulo->save();
             if (!empty($art_legacy->rm)) {
                 $rm_id = Rm::whereRm($art_legacy->rm)->value('id');
                 $articulo->rms()->attach($rm_id, ['monto' => $art_legacy->monto]);
             }
         }
     }
 }