add parent_role

apps/authorization/models.py

@@ -1,4 +1,5 @@
 from django.db import models
+
 from apps.authentication import models as auth_models
 from apps.core.models import BaseModel
 
@@ -52,6 +53,12 @@ class Permissions(BaseModel):
 
 
 class Role(BaseModel):
+    parent_role = models.ForeignKey(
+        'self',
+        on_delete=models.CASCADE,
+        related_name='child',
+        null=True
+    )
     role_name = models.CharField(max_length=50, unique=True)
     description = models.TextField(max_length=500)
     type = models.ForeignKey(