Try to reproduce bug

Author: roxblnfk

tests/ORM/Functional/Driver/Common/Integration/Case428/CaseTest.php

@@ -62,6 +62,23 @@ public function testSave(): void
         $this->save($purchaseOrder, ...$orderItems);
     }
 
+    public function testCreate(): void
+    {
+        $order = new Entity\Order('O0101');
+        $purchaseOrder = new PurchaseOrder('PO101');
+
+        $orderItems = [];
+        for ($i = 0; $i < 20; $i++) {
+            $orderItem = new Entity\OrderItem('A' . $i, 1);
+            $orderItem->order = $order;
+            // $order->items[] = $orderItem;
+            $orderItem->purchaseOrder = $purchaseOrder;
+            $orderItems[] = $orderItem;
+        }
+
+        $this->save($order, $purchaseOrder, ...$orderItems);
+    }
+
     public function setUp(): void
     {
         // Init DB

tests/ORM/Functional/Driver/Common/Integration/Case428/Entity/Order.php

@@ -16,5 +16,4 @@ public function __construct(string $number)
     {
         $this->number = $number;
     }
-
 }

tests/ORM/Functional/Driver/Common/Integration/Case428/Entity/OrderItem.php

@@ -6,19 +6,21 @@
 
 class OrderItem
 {
-
     public ?int $id = null;
-    public int $order_id;
+
     public string $sku;
     public int $quantity = 1;
+    public int $status = 0;
+
     public ?int $purchase_order_id = null;
     public ?PurchaseOrder $purchaseOrder = null;
-    public int $status = 0;
+
+    public int $order_id;
+    public Order $order;
 
     public function __construct(string $sku, int $quantity = 1)
     {
         $this->sku = $sku;
         $this->quantity = $quantity;
     }
-
 }

tests/ORM/Functional/Driver/Common/Integration/Case428/Entity/PurchaseOrder.php

@@ -6,15 +6,14 @@
 
 class PurchaseOrder
 {
-
     public ?int $id = null;
     public string $number;
+
     /** @var iterable<PurchaseOrderItem> */
     public iterable $items = [];
 
     public function __construct(string $number)
     {
         $this->number = $number;
     }
-
 }

tests/ORM/Functional/Driver/Common/Integration/Case428/Entity/PurchaseOrderItem.php

@@ -6,16 +6,17 @@
 
 class PurchaseOrderItem
 {
-
     public ?int $id = null;
+    public int $quantity = 1;
+
     public int $purchase_order_id;
+    public PurchaseOrder $purchaseOrder;
+
     public ?int $order_item_id = null;
     public ?OrderItem $orderItem = null;
-    public int $quantity = 1;
 
     public function __construct(int $quantity = 1)
     {
         $this->quantity = $quantity;
     }
-
 }

tests/ORM/Functional/Driver/Common/Integration/Case428/schema.php

@@ -4,6 +4,7 @@
 
 use Cycle\ORM\Mapper\Mapper;
 use Cycle\ORM\Relation;
+use Cycle\ORM\Schema\GeneratedField;
 use Cycle\ORM\SchemaInterface as Schema;
 use Cycle\ORM\Select\Repository;
 use Cycle\ORM\Select\Source;
@@ -46,6 +47,9 @@
             'number' => 'string',
         ],
         Schema::SCHEMA => [],
+        Schema::GENERATED_FIELDS => [
+            'id' => GeneratedField::ON_INSERT, // autoincrement
+        ],
     ],
     'order_item' => [
         Schema::ENTITY => OrderItem::class,
@@ -96,6 +100,9 @@
             'status' => 'int',
         ],
         Schema::SCHEMA => [],
+        Schema::GENERATED_FIELDS => [
+            'id' => GeneratedField::ON_INSERT, // autoincrement
+        ],
     ],
     'purchase_order' => [
         Schema::ENTITY => PurchaseOrder::class,
@@ -132,6 +139,9 @@
             'number' => 'string',
         ],
         Schema::SCHEMA => [],
+        Schema::GENERATED_FIELDS => [
+            'id' => GeneratedField::ON_INSERT, // autoincrement
+        ],
     ],
     'purchase_order_item' => [
         Schema::ENTITY => PurchaseOrderItem::class,
@@ -169,5 +179,8 @@
             'quantity' => 'int',
         ],
         Schema::SCHEMA => [],
+        Schema::GENERATED_FIELDS => [
+            'id' => GeneratedField::ON_INSERT, // autoincrement
+        ],
     ],
 ];