reconstruction of the project

app/Models/ClassProgressAttachment.php

@@ -2,11 +2,15 @@
 
 namespace App\Models;
 
-use Illuminate\Database\Eloquent\Model;
+use App\Models\BaseModel;
 
-class ClassProgressAttachment extends Model
+class ClassProgressAttachment extends BaseModel
 {
     protected $table = 'class_progress_attachments';
+
+    // CI: useTimestamps = false
+    public $timestamps = false;
+
     protected $fillable = [
         'report_id',
         'file_path',
@@ -15,5 +19,16 @@ class ClassProgressAttachment extends Model
         'file_size',
         'created_at',
     ];
-    public $timestamps = false;
+
+    protected $casts = [
+        'report_id'  => 'integer',
+        'file_size'  => 'integer',
+    ];
+
+    // Optional relationship
+    public function report()
+    {
+        // replace ClassProgressReport::class with your actual report model if different
+        return $this->belongsTo(ClassProgressReport::class, 'report_id');
+    }
 }