reconstruction of the project

app/Models/InventoryMovement.php

@@ -2,11 +2,15 @@
 
 namespace App\Models;
 
-use Illuminate\Database\Eloquent\Model;
+use App\Models\BaseModel;
 
-class InventoryMovement extends Model
+class InventoryMovement extends BaseModel
 {
     protected $table = 'inventory_movements';
+
+    // ✅ CI: useTimestamps = true (created_at/updated_at)
+    public $timestamps = true;
+
     protected $fillable = [
         'item_id',
         'qty_change',
@@ -22,5 +26,39 @@ class InventoryMovement extends Model
         'created_at',
         'updated_at',
     ];
-    public $timestamps = true;
+
+    protected $casts = [
+        'item_id'         => 'integer',
+        'qty_change'      => 'integer',
+        'performed_by'    => 'integer',
+        'teacher_id'      => 'integer',
+        'student_id'      => 'integer',
+        'class_section_id'=> 'integer',
+    ];
+
+    /* Optional relationships */
+    public function item()
+    {
+        return $this->belongsTo(InventoryItem::class, 'item_id');
+    }
+
+    public function performer()
+    {
+        return $this->belongsTo(User::class, 'performed_by');
+    }
+
+    public function teacher()
+    {
+        return $this->belongsTo(User::class, 'teacher_id');
+    }
+
+    public function student()
+    {
+        return $this->belongsTo(Student::class, 'student_id');
+    }
+
+    public function classSection()
+    {
+        return $this->belongsTo(ClassSection::class, 'class_section_id');
+    }
 }