[LiveComponent] Fix ComponentWithFormTrait not working in batch actions

Fix #1509

Thank you @jpvdw86 for your work on this!

Some parts of your PR would have introduced changes affecting all LiveComponent instances, including those not using ComponentWithFormTrait. To keep the impact as minimal as possible, I’ve opted for a more targeted fix.

You did all the hard work here—much appreciated! 🚀

Author: smnandre

src/LiveComponent/src/ComponentWithFormTrait.php

@@ -135,19 +135,27 @@ public function getFormName(): string
     /**
      * Reset the form to its initial state, so it can be used again.
      */
-    private function resetForm(): void
+    private function resetForm(bool $soft = false): void
     {
         // prevent the system from trying to submit this reset form
         $this->shouldAutoSubmitForm = false;
         $this->form = null;
         $this->formView = null;
-        $this->formValues = $this->extractFormValues($this->getFormView());
+        if (true !== $soft) {
+            $this->formValues = $this->extractFormValues($this->getFormView());
+        }
     }
 
     private function submitForm(bool $validateAll = true): void
     {
         if (null !== $this->formView) {
-            throw new \LogicException('The submitForm() method is being called, but the FormView has already been built. Are you calling $this->getForm() - which creates the FormView - before submitting the form?');
+            // Two scenarios can cause this:
+            // 1) Not intended: form was already submitted and validated in the same main request.
+            // 2) Expected: form was submitted during a sub-request (e.g., a batch action).
+            //
+            // Before 2.23, both cases triggered an exception.
+            // Since 2.23, we reset the form (preserving its values) to handle case 2 correctly.
+            $this->resetForm(true);
         }
 
         $form = $this->getForm();