From 59a90c441191f673d73381e2819e82fd9c1b4761 Mon Sep 17 00:00:00 2001
From: Mojmir Fendek <mfendek@silverstripe.com>
Date: Wed, 11 May 2022 16:38:36 +1200
Subject: [PATCH] BUG: Backwards compatibility patch fix.

---
 _legacy/SnapshotScaffoldingProvider.php | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/_legacy/SnapshotScaffoldingProvider.php b/_legacy/SnapshotScaffoldingProvider.php
index 96f7ccc..4c14652 100644
--- a/_legacy/SnapshotScaffoldingProvider.php
+++ b/_legacy/SnapshotScaffoldingProvider.php
@@ -11,7 +11,7 @@
 use SilverStripe\ORM\DataObject;
 use SilverStripe\Security\Member;
 
-if (!interface_exists(ScaffoldingProvider::class) || !class_exists(ReadOneLegacyResolver::class)) {
+if (!interface_exists(ScaffoldingProvider::class)) {
     return;
 }
 
@@ -49,13 +49,22 @@ public function provideGraphQLScaffolding(SchemaScaffolder $scaffolder): void
                 $fields[] = 'AbsoluteLink';
             }
 
-            $scaffolder->type($inst->baseClass())
-                ->addFields($fields)
-                ->operation(SchemaScaffolder::READ_ONE)
-                    ->addArg('filter', 'IDFilterType!')
-                    ->setResolver(new ReadOneLegacyResolver($inst))
-                ->end()
-                ->operation('rollback');
+            if (class_exists(ReadOneLegacyResolver::class)) {
+                $scaffolder->type($inst->baseClass())
+                    ->addFields($fields)
+                    ->operation(SchemaScaffolder::READ_ONE)
+                        ->addArg('filter', 'IDFilterType!')
+                        ->setResolver(new ReadOneLegacyResolver($inst))
+                    ->end()
+                    ->operation('rollback');
+            } else {
+                $scaffolder->type($inst->baseClass())
+                    ->addFields($fields)
+                    ->operation(SchemaScaffolder::READ_ONE)
+                        ->addArg('filter', 'IDFilterType!')
+                    ->end()
+                    ->operation('rollback');
+            }
         }
     }
 }