Add region object

engine/apps/user_management/models/organization.py

@@ -54,6 +54,12 @@ class Organization(MaintainableObject):
     org_slug = models.CharField(max_length=300)
     org_title = models.CharField(max_length=300)
     region_slug = models.CharField(max_length=300, null=True, default=None)
+    migration_destination = models.ForeignKey(
+        to="user_management.Region",
+        on_delete=models.SET_NULL,
+        related_name="regions",
+        default=None,
+    )
 
     grafana_url = models.URLField()
 

engine/apps/user_management/models/region.py

@@ -0,0 +1,33 @@
+from django.conf import settings
+from django.core.validators import MinLengthValidator
+from django.db import models
+
+from common.public_primary_keys import generate_public_primary_key, increase_public_primary_key_length
+
+
+def generate_public_primary_key_for_region():
+    prefix = "R"
+    new_public_primary_key = generate_public_primary_key(prefix)
+
+    failure_counter = 0
+    while Region.objects.filter(public_primary_key=new_public_primary_key).exists():
+        new_public_primary_key = increase_public_primary_key_length(
+            failure_counter=failure_counter, prefix=prefix, model_name="Region"
+        )
+        failure_counter += 1
+
+    return new_public_primary_key
+
+
+class Region(models.Model):
+    public_primary_key = models.CharField(
+        max_length=20,
+        validators=[MinLengthValidator(settings.PUBLIC_PRIMARY_KEY_MIN_LENGTH + 1)],
+        unique=True,
+        default=generate_public_primary_key_for_region,
+    )
+
+    name = models.CharField(max_length=300)
+    slug = models.CharField(max_length=300, unique=True)
+    oncall_backend_url = models.URLField()
+    is_default = models.BooleanField(default=False)