update post_stats table migration: add 'non_negative_columns' constraint

Author: ChristianDelvianto

database/migrations/2026_10_30_083501_create_post_stats_table.php

@@ -2,6 +2,7 @@
 
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Schema;
 
 return new class extends Migration
@@ -28,6 +29,18 @@ public function up(): void
             // Indexes
             $table->primary('post_id');
         });
+
+        // Add the non-negative constraint
+        DB::statement(
+            'ALTER TABLE post_stats
+            ADD CONSTRAINT non_negative_columns
+            CHECK (
+                comments_count >= 0
+                AND likes_count >= 0
+                AND shares_count >= 0
+                AND views_count >= 0
+            )'
+        );
     }
 
     /**