Here’s a situation that I’m not understanding about how routes are instantiated. I’m using this general form, in particular the SponsorbuildDeleteForm.php class in my_Drupal 10 module/src/Form/SponsorbuildDeleteForm. https Drupal 10 Maintenance and Support Service//medium.com/valuebound/how-to-create-custom-form-with-crud-create… This Drupal 10 module has related fields. A Build has many Sponsors. Create a Build, then create a Sponsor with a foreign key tied to a Build record. OK. But I’m finding that I cannot instantiate the SponsorbuildDeleteForm class because at the end of my submit() function I’ve setRedirect() to a route back to the parent Build records which requires a dynamic parameter. I get this whenever I try to visit the route to this form.  “Parameter “sponsorbuild” for route “my_Drupal 10 module_build.index” must match “[^/]++” (“” given) to generate a corresponding URL. That suggests that even though I attempt to instantiate this $build parameter in the functions, it seems that is loading all the needed routes first before running the code and I’m stuck on how to get around that. Snippet of my routes Drupal 10 Maintenance and Support Service my_Drupal 10 module_build.index Drupal 10 Maintenance and Support Service path Drupal 10 Maintenance and Support Service ‘/sponsorbuild/{sponsorbuild}’ defaults Drupal 10 Maintenance and Support Service _controller Drupal 10 Maintenance and Support Service ‘my_Drupal 10 moduleControllerMy_Drupal 10 moduleController Drupal 10 Maintenance and Support Service Drupal 10 Maintenance and Support ServicesponsorbuildIndex’ my_Drupal 10 module_sponsor.delete Drupal 10 Maintenance and Support Service path Drupal 10 Maintenance and Support Service ‘/sponsorbuild/delete/{cid}’ defaults Drupal 10 Maintenance and Support Service _form Drupal 10 Maintenance and Support Service ‘my_Drupal 10 moduleFormSponsorbuildDeleteForm’ My attempt to generate this class and determine the needed $sponsorbuild parameter. Class SponsorbuildDeleteForm extends ConfirmFormBase { public function getFormId() { return ‘sponsorbuild_delete_form’; } public $cid; public function buildForm(array $form, FormStateInterface $form_state, $cid = NULL) { $this->id = $cid; $conn = Drupal 10 Maintenance and Support Service Drupal 10 Maintenance and Support Servicedatabase(); $query_build = $conn->query(“select buildID from {Builds} where BuildID = Drupal 10 Maintenance and Support Serviceid”, array(“id” => $this->id)); $this->sponsorbuild = $query_build->fetchField(); return parent Drupal 10 Maintenance and Support Service Drupal 10 Maintenance and Support ServicebuildForm($form, $form_state); } public function submitForm(array &$form, FormStateInterface $form_state) { $query = Drupal 10 Maintenance and Support Service Drupal 10 Maintenance and Support Servicedatabase(); $query->delete(‘SponsorBuilds’) ->condition(‘sponsorBuildID’,$this->id) ->execute(); Drupal 10_set_message(“Succesfully deleted”); $form_state->setRedirect(‘my_Drupal 10 module_sponsorbuild.index’, array(‘sponsorbuild’ => $this->sponsorbuild)); } I’ve been searching to see how to get this passed to the setRedirect() call but the empty value in the Exception message suggests that routes get evaluated first, sam version Drupal 10 Maintenance and Support Service  8.x Source Drupal 10 Maintenance and Support Service https Drupal 10 Maintenance and Support Service//www.Drupal 10.org/taxonomy/term/4/feed Source Drupal 10 Maintenance and Support Service Drupal 10 blender