fix inventory

app/Models/InventoryMovement.php

@@ -23,6 +23,13 @@ class InventoryMovement extends BaseModel
         'teacher_id',
         'student_id',
         'class_section_id',
+        // Audit/correction fields
+        'voided_at',
+        'voided_by',
+        'void_reason',
+        'corrects_movement_id',
+        'source_type',
+        'source_id',
     ];
 
     protected $casts = [
@@ -32,8 +39,23 @@ class InventoryMovement extends BaseModel
         'teacher_id'      => 'integer',
         'student_id'      => 'integer',
         'class_section_id'=> 'integer',
+        'voided_by'       => 'integer',
+        'corrects_movement_id' => 'integer',
+        'source_id'       => 'integer',
+        'voided_at'       => 'datetime',
     ];
 
+    /* Scopes */
+    public function scopeNotVoided($query)
+    {
+        return $query->whereNull('voided_at');
+    }
+
+    public function scopeVoided($query)
+    {
+        return $query->whereNotNull('voided_at');
+    }
+
     /* Optional relationships */
     public function item()
     {
@@ -59,4 +81,19 @@ class InventoryMovement extends BaseModel
     {
         return $this->belongsTo(ClassSection::class, 'class_section_id');
     }
+
+    public function voidedBy()
+    {
+        return $this->belongsTo(User::class, 'voided_by');
+    }
+
+    public function correctsMovement()
+    {
+        return $this->belongsTo(self::class, 'corrects_movement_id');
+    }
+
+    public function corrections()
+    {
+        return $this->hasMany(self::class, 'corrects_movement_id');
+    }
 }