update

app/Models/ReceiptItemModel.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use CodeIgniter\Model;
+
+class ReceiptItemModel extends Model
+{
+    protected $table         = 'receipt_items';
+    protected $primaryKey    = 'id';
+    protected $returnType    = 'array';
+    protected $useTimestamps = true;
+    protected $allowedFields = [
+        'receipt_id', 'name', 'display_name', 'qty', 'amount',
+        'suggested_category_id', 'chosen_category_id',
+    ];
+
+    /**
+     * Pozycje danego paragonu w kolejnosci wprowadzenia.
+     */
+    public function forReceipt(int $receiptId): array
+    {
+        return $this->where('receipt_id', $receiptId)
+            ->orderBy('id', 'ASC')
+            ->findAll();
+    }
+}