migration to new backend

backend/server/worldtravel/models.py

@@ -0,0 +1,59 @@
+from django.db import models
+from django.contrib.auth import get_user_model
+
+
+User = get_user_model()
+
+default_user_id = 1  # Replace with an actual user ID
+
+class Country(models.Model):
+    AFRICA = 'AF'
+    ANTARCTICA = 'AN'
+    ASIA = 'AS'
+    EUROPE = 'EU'
+    NORTH_AMERICA = 'NA'
+    OCEANIA = 'OC'
+    SOUTH_AMERICA = 'SA'
+    
+    CONTINENT_CHOICES = [
+        (AFRICA, 'Africa'),
+        (ANTARCTICA, 'Antarctica'),
+        (ASIA, 'Asia'),
+        (EUROPE, 'Europe'),
+        (NORTH_AMERICA, 'North America'),
+        (OCEANIA, 'Oceania'),
+        (SOUTH_AMERICA, 'South America'),
+    ]
+
+    id = models.AutoField(primary_key=True)
+    name = models.CharField(max_length=100)
+    country_code = models.CharField(max_length=2)
+    continent = models.CharField(
+        max_length=2,
+        choices=CONTINENT_CHOICES,
+        default=AFRICA
+    )
+
+    class Meta:
+        verbose_name = "Country"
+        verbose_name_plural = "Countries"
+
+    def __str__(self):
+        return self.name
+
+class Region(models.Model):
+    id = models.CharField(primary_key=True)
+    name = models.CharField(max_length=100)
+    country = models.ForeignKey(Country, on_delete=models.CASCADE)
+
+    def __str__(self):
+        return self.name
+
+class VisitedRegion(models.Model):
+    id = models.AutoField(primary_key=True)
+    user_id = models.ForeignKey(
+        User, on_delete=models.CASCADE, default=default_user_id)
+    region = models.ForeignKey(Region, on_delete=models.CASCADE)
+
+    def __str__(self):
+        return f'{self.region.name} ({self.region.country.country_code}) visited by: {self.user_id.username}'