from django.db import models


class City(models.Model):
    name        = models.CharField(max_length = 120)
    class Meta:
        verbose_name_plural = 'Cities'

    def __str__(self):
        return self.name


class Place(models.Model):
    city        = models.ForeignKey(City, on_delete = models.CASCADE)
    name        = models.CharField(max_length = 120)

    def __str__(self):
        return self.name


class Location(models.Model):
    name        = models.CharField(max_length = 120)
    city        = models.ForeignKey(City, on_delete = models.SET_NULL, null = True)
    place       = models.ForeignKey(Place, on_delete = models.SET_NULL, null = True)

    def __str__(self):
        return self.name