update

core/apps/api/models/ad/variant.py

@@ -0,0 +1,26 @@
+from django.db import models
+from django_core.models.base import AbstractBaseModel
+from django.utils.translation import gettext_lazy as _
+from django.core.validators import MinValueValidator
+
+
+class AdVariantModel(AbstractBaseModel):
+    ad = models.ForeignKey("api.AdModel", on_delete=models.CASCADE, related_name="variants", verbose_name=_("Ad"))
+    color = models.ForeignKey(
+        "api.ColorModel", on_delete=models.CASCADE, verbose_name=_("Color"), null=True, blank=False
+    )
+    size = models.ForeignKey("api.SizeModel", on_delete=models.CASCADE, verbose_name=_("Size"), null=True, blank=False)
+    is_available = models.BooleanField(_("Is Available"), default=True)
+    price = models.DecimalField(_("Price"), max_digits=10, decimal_places=2, validators=[MinValueValidator(0)])
+    stock_quantity = models.PositiveIntegerField(_("Stock Quantity"), default=0)
+
+    def __str__(self):
+        return f"{self.color} - {self.size}"
+
+    class Meta:
+        db_table = "ad_variant"
+        verbose_name = _("Ad Variant")
+        verbose_name_plural = _("Ad Variants")
+        indexes = [
+            models.Index(fields=["ad", "is_available"]),
+        ]