public function store(Request $request)
    {
        if($request->nombre !="" && $request->apellidos != "" && $request->telefono != "" && $request->email != "" && $request->cv != ""){
            if($request->cv->getClientOriginalExtension() == "pdf")
            {
                $path = $request->file('cv')->store('public/storage/unete/cv');
                $path = str_replace("public","public",$path);
                $solicitudes = new SolicitudesTable();
                $solicitudes->tipo = $request->tipo;
                $solicitudes->nombre = $request->nombre;
                $solicitudes->apellidos = $request->apellidos;
                $solicitudes->telefono = $request->telefono;
                $solicitudes->email = $request->email;
                $solicitudes->grado_academico = $request->grado_academico;
                $solicitudes->comentarios = $request->comentarios;
                $solicitudes->cv = $path;
                $solicitudes->save();
                return back()->with('correcto',"Guardado");

            }else {
                return back()->with('error',"Formato de archivo incorrecto");
            }
        }else{
            return back()->with('camposvacios',"Falta completar algunos datos");
        }
    }

<tbody>
         @for($i = 0; $i<sizeof($promotor); $i++)
                      <tr>
      <td>{{$promotor[$i]->nombre}} {{ $promotor[$i]->apellidos}}</td>
                            <td>{{$promotor[$i]->telefono}}</td>
                            <td>{{$promotor[$i]->email}}</td>
                            <td>{{$promotor[$i]->grado_academico}}</td>
                            <td>
                              <a href="{{url('storage/'.$promotor[$i]->cv)}}" target="_blank">
                                <i class="fa fa-eye" aria-hidden="true"></i>
                              </a>
                            </td>
                            <td>{{$promotor[$i]->comentarios}}</td>
                            <th scope="row"><a class="fa fa-trash" aria-hidden="true" href="#" onclick="borrar({{$promotor[$i]->id}})"></a></th>
                          </tr>
                        @endfor
                    </tbody>