Fix for vendor prefixed fieldset handles (#339)

Author: ryanmitchell

src/Fields/FieldsetRepository.php

@@ -6,6 +6,7 @@
 use Statamic\Facades\Blink;
 use Statamic\Fields\Fieldset;
 use Statamic\Fields\FieldsetRepository as StacheRepository;
+use Statamic\Support\Str;
 
 class FieldsetRepository extends StacheRepository
 {
@@ -18,8 +19,14 @@ public function all(): Collection
 
             return $models->map(function ($model) {
                 return Blink::once("eloquent-fieldset-{$model->handle}", function () use ($model) {
+                    $handle = $model->handle;
+
+                    if (Str::startsWith($handle, 'vendor.')) {
+                        $handle = Str::of($handle)->after('vendor.')->replaceFirst('.', '::');
+                    }
+
                     return (new Fieldset)
-                        ->setHandle($model->handle)
+                        ->setHandle($handle)
                         ->setContents($model->data);
                 });
             });
@@ -30,6 +37,10 @@ public function find($handle): ?Fieldset
     {
         $handle = str_replace('/', '.', $handle);
 
+        if (Str::startsWith($handle, 'vendor.')) {
+            $handle = Str::of($handle)->after('vendor.')->replaceFirst('.', '::');
+        }
+
         return $this->all()->filter(function ($fieldset) use ($handle) {
             return $fieldset->handle() == $handle;
         })->first();