fix error in gitignore

apps/payments/models.py

@@ -0,0 +1,41 @@
+from django.db import models
+
+from apps.core.models import TimeStampedModel, UUIDModel
+
+
+class Payment(UUIDModel, TimeStampedModel):
+    class Status(models.TextChoices):
+        PENDING = "pending", "Pending"
+        SUCCESS = "success", "Success"
+        FAILED = "failed", "Failed"
+        CANCELLED = "cancelled", "Cancelled"
+
+    # A payment targets either a reservation (upfront) or a processing order.
+    reservation = models.ForeignKey(
+        "reservations.Reservation", null=True, blank=True, on_delete=models.PROTECT, related_name="payments"
+    )
+    order = models.ForeignKey(
+        "orders.ProcessingOrder", null=True, blank=True, on_delete=models.PROTECT, related_name="payments"
+    )
+    amount = models.DecimalField(max_digits=18, decimal_places=2)
+    currency = models.CharField(max_length=8, default="IRR")
+    gateway = models.CharField(max_length=40)
+    transaction_id = models.CharField(max_length=120)
+    authority = models.CharField(max_length=120, blank=True)
+    status = models.CharField(max_length=12, choices=Status.choices, default=Status.PENDING)
+    request_time = models.DateTimeField(null=True, blank=True)
+    callback_time = models.DateTimeField(null=True, blank=True)
+    verification_time = models.DateTimeField(null=True, blank=True)
+    error = models.TextField(blank=True)
+
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(fields=["gateway", "transaction_id"], name="uniq_gateway_transaction"),
+            models.CheckConstraint(
+                condition=models.Q(order__isnull=False) | models.Q(reservation__isnull=False),
+                name="payment_has_target",
+            ),
+        ]
+
+    def __str__(self) -> str:
+        return f"{self.gateway}:{self.transaction_id}"