Added Flight class

simulator/models/flight.py

@@ -0,0 +1,36 @@
+from django.db import models
+from .carrier import Carrier
+from .aircraft import Equipment
+from .aerodrome import Aerodrome
+from django.core.validators import MinValueValidator, MaxValueValidator
+
+
+class Flight(models.Model):
+    carrier = models.ForeignKey(
+        Carrier, on_delete=models.CASCADE, related_name="flights"
+    )
+    equipment = models.ForeignKey(
+        Equipment, on_delete=models.CASCADE, related_name="flights"
+    )
+    origin = models.ForeignKey(
+        Aerodrome, on_delete=models.CASCADE, related_name="departures"
+    )
+    destination = models.ForeignKey(
+        Aerodrome, on_delete=models.CASCADE, related_name="arrivals"
+    )
+
+    flight_number = models.PositiveIntegerField(
+        validators=[MinValueValidator(1), MaxValueValidator(9999)]
+    )
+    departure_time = models.DateTimeField()
+    arrival_time = models.DateTimeField()
+
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(
+                fields=["carrier", "flight_number"], name="unique_flight_per_carrier"
+            )
+        ]
+
+    def __str__(self):
+        return f"{self.carrier.icao}{self.flight_number} {self.origin.icao} > {self.destination.icao}"