Support for saving members attribute upon group create (and similar cases)

src/Attribute/MutableCollection.php

@@ -46,19 +46,28 @@ public function replace($value, Model &$object, ?Path $path = null)
 
         // Check if objects exist
         $existingObjects = $object
-            ->{$this->attribute}()
-            ->getRelated()
-            ::findMany($values)
+        ->{$this->attribute}()
+        ->getRelated()
+        ::findMany($values);
+        $existingObjectIds = $existingObjects
             ->map(fn ($o) => $o->getKey());
 
-        if (($diff = collect($values)->diff($existingObjects))->count() > 0) {
+        if (($diff = collect($values)->diff($existingObjectIds))->count() > 0) {
             throw new SCIMException(
                 sprintf('One or more %s are unknown: %s', $this->attribute, implode(',', $diff->all())),
                 500
             );
         }
 
-        $object->{$this->attribute}()->sync($existingObjects->all());
+        // Act like the relation is already saved. This allows running validations, if needed.
+        $object->setRelation($this->attribute, $existingObjects);
+
+        $object->saved(function (Model $model) use ($object, $existingObjectIds)  {
+            // Save relationships only after the model is saved. Essential if the model is new.
+            // Intentionlly `$object` is used instead of `$model`, to avoid accidentially updating the wrong model.
+            $object->{$this->attribute}()->sync($existingObjectIds->all());    
+        });
+
     }
 
     public function patch($operation, $value, Model &$object, ?Path $path = null)

tests/GroupsTest.php

@@ -3,6 +3,7 @@
 namespace ArieTimmerman\Laravel\SCIMServer\Tests;
 
 use ArieTimmerman\Laravel\SCIMServer\Tests\Model\Group;
+use ArieTimmerman\Laravel\SCIMServer\Tests\Model\User;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
 
@@ -69,6 +70,37 @@ public function testCreate(){
 
     }
 
+    public function testCreateWithMembers(){
+        $response = $this->post('/scim/v2/Groups', [
+            'schemas' => ['urn:ietf:params:scim:schemas:core:2.0:Group'], // Required
+            'urn:ietf:params:scim:schemas:core:2.0:Group' => [
+                'displayName' => 'TestGroup',
+                'members' => [
+                    [
+                        'value' => User::first()->id,
+                    ]
+                ]
+            ]
+        ]);
+
+        $response->assertJsonStructure([
+            'id',
+            'urn:ietf:params:scim:schemas:core:2.0:Group' => [
+                'displayName',
+                'members' => [
+                    0 => [
+                        'value',
+                        'display'
+                    ]
+                ]
+            ]
+        ]);
+
+        $this->assertEquals(User::first()->id, $response->json(['urn:ietf:params:scim:schemas:core:2.0:Group'])['members'][0]['value']);
+        $this->assertNotNull(Group::find($response->json('id')));
+        $this->assertNotNull(Group::where('displayName', 'TestGroup')->first());
+    }
+
     public function testBulk(){
         $response = $this->post('/scim/v2/Bulk', [
             'schemas' => ['urn:ietf:params:scim:api:messages:2.0:BulkRequest'], // Required