init new apps

lettings/models.py

@@ -0,0 +1,23 @@
+from django.db import models
+from django.core.validators import MaxValueValidator, MinLengthValidator
+
+
+class Address(models.Model):
+    number = models.PositiveIntegerField(validators=[MaxValueValidator(9999)])
+    street = models.CharField(max_length=64)
+    city = models.CharField(max_length=64)
+    state = models.CharField(max_length=2, validators=[MinLengthValidator(2)])
+    zip_code = models.PositiveIntegerField(validators=[MaxValueValidator(99999)])
+    country_iso_code = models.CharField(max_length=3, validators=[MinLengthValidator(3)])
+
+    def __str__(self):
+        return f'{self.number} {self.street}'
+
+
+class Letting(models.Model):
+    title = models.CharField(max_length=256)
+    address = models.OneToOneField(Address, on_delete=models.CASCADE)
+
+    def __str__(self):
+        return self.title
+