rateing system

backend/product/models.py

@@ -493,3 +493,37 @@ class ProductVariant(DirtyFieldsMixin, models.Model):
     def save(self, *args, **kwargs):
         self.set_or_update_price()
         super().save(*args, **kwargs)
+
+class ProductRating(models.Model):
+    RATING_CHOICES = (
+        (1, '1 - بسیار ضعیف'),
+        (2, '2 - ضعیف'),
+        (3, '3 - متوسط'),
+        (4, '4 - خوب'),
+        (5, '5 - عالی'),
+    )
+    
+    product = models.ForeignKey(
+        ProductModel, on_delete=models.CASCADE, related_name='ratings', verbose_name='محصول')
+    user = models.ForeignKey(
+        User, on_delete=models.CASCADE, related_name='product_ratings', verbose_name='کاربر')
+    rating = models.PositiveIntegerField(
+        choices=RATING_CHOICES, verbose_name='امتیاز')
+    created_at = models.DateTimeField(
+        auto_now_add=True, verbose_name='تاریخ ایجاد')
+    updated_at = models.DateTimeField(
+        auto_now=True, verbose_name='تاریخ آپدیت')
+
+    class Meta:
+        verbose_name = 'امتیاز محصول'
+        verbose_name_plural = 'امتیازات محصول'
+        unique_together = ('product', 'user')
+        ordering = ['-created_at']
+        indexes = [
+            models.Index(fields=['product'], name='rating_product_idx'),
+            models.Index(fields=['user'], name='rating_user_idx'),
+            models.Index(fields=['rating'], name='rating_rating_idx'),
+        ]
+
+    def __str__(self):
+        return f"{self.user} - {self.product} ({self.rating}⭐)"