fix bug

database/migrations/2026_06_06_000001_add_total_referrals_to_customers_table.php

@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddTotalReferralsToCustomersTable extends Migration
+{
+    public function up()
+    {
+        if (Schema::hasColumn('customers', 'total_referrals')) {
+            return;
+        }
+
+        Schema::table('customers', function (Blueprint $table) {
+            $table->unsignedInteger('total_referrals')->default(0)->after('referral_to_id');
+        });
+    }
+
+    public function down()
+    {
+        if (!Schema::hasColumn('customers', 'total_referrals')) {
+            return;
+        }
+
+        Schema::table('customers', function (Blueprint $table) {
+            $table->dropColumn('total_referrals');
+        });
+    }
+}