first upload all files

Modules/FlashSale/Http/Requests/SaveFlashSaleRequest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Modules\FlashSale\Http\Requests;
+
+use Illuminate\Validation\Rule;
+use Modules\Core\Http\Requests\Request;
+
+class SaveFlashSaleRequest extends Request
+{
+    /**
+     * Available attributes.
+     *
+     * @var string
+     */
+    protected $availableAttributes = 'flashsale::attributes';
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'campaign_name' => ['required'],
+            'products.*.product_id' => ['required', Rule::exists('products', 'id')],
+            'products.*.end_date' => ['required', 'date'],
+            'products.*.price' => ['required', 'numeric', 'min:0', 'max:99999999999999'],
+            'products.*.qty' => ['required', 'numeric', 'min:0'],
+        ];
+    }
+}