Fehler in Abrechnungsende behoben

app/Domains/CostUnit/Actions/ChangeCostUnitDetails/ChangeCostUnitDetailsCommand.php

@@ -14,7 +14,7 @@ class ChangeCostUnitDetailsCommand {
 
         $this->request->costUnit->distance_allowance = $this->request->distanceAllowance->getAmount();
         $this->request->costUnit->mail_on_new = $this->request->mailOnNew;
-        $this->request->costUnit->billing_deadline = $this->request->billingDeadline;
+        $this->request->costUnit->billing_deadline = $this->request->billingDeadline?->format('Y-m-d');
 
         $response->success = $this->request->costUnit->save();
         return $response;

app/Domains/CostUnit/Actions/CreateCostUnit/CreateCostUnitCommand.php

@@ -17,7 +17,7 @@ class CreateCostUnitCommand {
             'name' => $this->request->name,
             'tenant' => currentTenant()->slug,
             'type' => $this->request->type,
-            'billing_deadline' => $this->request->billingDeadline,
+            'billing_deadline' => $this->request->billingDeadline?->format('Y-m-d'),
             'distance_allowance' => $this->request->distanceAllowance->getAmount(),
             'mail_on_new' => $this->request->mailOnNew,
             'allow_new' => true,

app/Domains/CostUnit/Controllers/EditController.php

@@ -37,7 +37,10 @@ class EditController extends CommonController{
 
         $saveParams = $request->get('formData');
         $distanceAllowance = Amount::fromString($saveParams['distanceAllowance']);
-        $billingDeadline = isset($saveParams['billingDeadline']) ? \DateTime::createFromFormat('Y-m-d', $saveParams['billingDeadline']) : null;
+        $rawBillingDeadline = $saveParams['billingDeadline'] ?? null;
+        $billingDeadline = !empty($rawBillingDeadline)
+            ? (\DateTime::createFromFormat('!Y-m-d', $rawBillingDeadline) ?: null)
+            : null;
 
         $request = new ChangeCostUnitDetailsRequest($costUnit, $distanceAllowance, $saveParams['mailOnNew'], $billingDeadline);
         $command = new ChangeCostUnitDetailsCommand($request);