from django.db import models class Aerodrome(models.Model): icao = models.CharField(max_length=4, unique=True) iata = models.CharField(max_length=3, unique=True, blank=True, null=True) name = models.CharField(max_length=100) city = models.CharField(max_length=100) country = models.CharField(max_length=3) latitude = models.FloatField() longitude = models.FloatField() altitude = models.IntegerField() def __str__(self): return f"{self.icao} - {self.city}"