symfony - Export .csv from database with symfony2 -

i didn't method work, maybe has idea.

/**  * @route("/export", name="export")  * @template("appbundle:expenses:export.html.twig")  */ public function exportaction() {      $repository = $this->getdoctrine()->getrepository('appbundle:expenses');      $query = $repository->createquerybuilder('s');     $query->orderby('s.id', 'desc');      $data = $query->getquery()->getresult(); $filename = "export_".date("y_m_d_his").".csv";      $response = $this->render('appbundle:expenses:export.html.twig', array('data' => $data));      $response->setstatuscode(200);     $response->headers->set('content-type', 'text/csv');     $response->headers->set('content-description', 'submissions export');     $response->headers->set('content-disposition', 'attachment; filename='.$filename);     $response->headers->set('content-transfer-encoding', 'binary');     $response->headers->set('pragma', 'no-cache');     $response->headers->set('expires', '0');      return $response; } 

i got:

unable find expenses entity. 404 not found - notfoundhttpexception 

the funny thing: in other method working:

$entity = $em->getrepository('appbundle:expenses')->find($id); 

so, there expenses entity under appbundle. error come from?

-- routes:

[router] current routes  name                     method scheme host path  _assetic_bootstrap_css          /styles/bootstrap.css  _assetic_bootstrap_css_0        /styles/bootstrap__bootstrap_1.css  _assetic_bootstrap_css_1        /styles/bootstrap_form_2.css  _assetic_bootstrap_js           /javascripts/bootstrap.js  _assetic_bootstrap_js_0         /javascripts/bootstrap_transition_1.js  _assetic_bootstrap_js_1         /javascripts/bootstrap_alert_2.js  _assetic_bootstrap_js_2         /javascripts/bootstrap_button_3.js  _assetic_bootstrap_js_3         /javascripts/bootstrap_carousel_4.js  _assetic_bootstrap_js_4         /javascripts/bootstrap_collapse_5.js  _assetic_bootstrap_js_5         /javascripts/bootstrap_dropdown_6.js  _assetic_bootstrap_js_6         /javascripts/bootstrap_modal_7.js  _assetic_bootstrap_js_7         /javascripts/bootstrap_tooltip_8.js  _assetic_bootstrap_js_8         /javascripts/bootstrap_popover_9.js  _assetic_bootstrap_js_9         /javascripts/bootstrap_scrollspy_10.js  _assetic_bootstrap_js_10        /javascripts/bootstrap_tab_11.js  _assetic_bootstrap_js_11        /javascripts/bootstrap_affix_12.js  _assetic_bootstrap_js_12        /javascripts/bootstrap_bc-bootstrap-collection_13.js  _assetic_jquery                 /javascripts/jquery.js  _assetic_jquery_0               /javascripts/jquery_jquery-1.11.1_1.js  _assetic_fddb9b6                /css/fddb9b6.css  _assetic_fddb9b6_0              /css/fddb9b6_part_1.css  _assetic_ae00be7                /styles/all.css  _assetic_ae00be7_0              /styles/all_part_1_main_1.css  _assetic_215113c                /js/215113c.js  _assetic_215113c_0              /js/215113c_part_1.js  _assetic_cd44034                /js/cd44034.js  _assetic_cd44034_0              /js/cd44034_part_1.js  _wdt                            /_wdt/{token}  _profiler_home                  /_profiler/  _profiler_search                /_profiler/search  _profiler_search_bar            /_profiler/search_bar  _profiler_purge                 /_profiler/purge  _profiler_info                  /_profiler/info/{about}  _profiler_phpinfo               /_profiler/phpinfo  _profiler_search_results        /_profiler/{token}/search/results  _profiler                       /_profiler/{token}  _profiler_router                /_profiler/{token}/router  _profiler_exception             /_profiler/{token}/exception  _profiler_exception_css         /_profiler/{token}/exception.css  _configurator_home              /_configurator/  _configurator_step              /_configurator/step/{index}  _configurator_final             /_configurator/final  _twig_error_test                /_error/{code}.{_format}  dashboard                       /  seite2                          /seite2  seite3                          /seite3  expenses                        /expenses/  expenses_create          post       /expenses/  expenses_new                    /expenses/new  expenses_show                   /expenses/{id}  expenses_edit                   /expenses/{id}/edit  expenses_update          put        /expenses/{id}  expenses_delete          delete     /expenses/{id}  expenses_export                 /expenses/export  userlogin                       /login  userlogincheck                  /login_check  userlogout                      /logout  userregister                    /register  user                            /user/  user_new                        /user/new  user_show                       /user/{id}  user_edit                       /user/{id}/edit  user_update              put        /user/{id}  user_delete              delete     /user/{id}  login                           /login  login_check                     /login_check