Detach components from group on deletion via model event (#330)

Author: Copilot

src/Models/ComponentGroup.php

@@ -47,6 +47,13 @@ class ComponentGroup extends Model
         'visible',
     ];
 
+    protected static function booted(): void
+    {
+        static::deleting(function (ComponentGroup $componentGroup): void {
+            $componentGroup->components()->update(['component_group_id' => null]);
+        });
+    }
+
     /**
      * Get the components in the group.
      *

tests/Unit/Models/ComponentGroupTest.php

@@ -157,3 +157,28 @@
     // Should be expanded
     expect($group->fresh()->isExpanded())->toBeTrue();
 });
+
+it('resets component_group_id on components when the group is deleted', function () {
+    $group = ComponentGroup::factory()->hasComponents(2)->create();
+    $componentIds = $group->components->pluck('id');
+
+    $group->delete();
+
+    foreach ($componentIds as $id) {
+        $this->assertDatabaseHas('components', [
+            'id' => $id,
+            'component_group_id' => null,
+        ]);
+    }
+});
+
+it('does not delete components when the group is deleted', function () {
+    $group = ComponentGroup::factory()->hasComponents(2)->create();
+    $componentIds = $group->components->pluck('id');
+
+    $group->delete();
+
+    foreach ($componentIds as $id) {
+        $this->assertDatabaseHas('components', ['id' => $id]);
+    }
+});