Improved Model Admin views, student adds user for login

techdb/flightslot/signals.py

@@ -0,0 +1,32 @@
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+from django.contrib.auth.models import User
+from django.contrib.auth.models import Group
+from .models import Student
+
+@receiver(post_save, sender=Student)
+def create_user_for_student(sender: Student, instance: Student, created, **kwargs):
+    if created and not instance.user:
+        print("_____ SAVING USER _____")
+        username = f"{instance.name.lower()}.{instance.surname.lower()}"
+        # Avoid username conflict with progressive number
+        base_username = username
+        counter = 1
+        while User.objects.filter(username=username).exists():
+            username = f"{base_username}{counter}"
+            counter += 1
+        # Generate standard password for every student
+        password = f"{instance.name.lower()[0]}{instance.surname.lower()}{instance.id}"
+        # Create user
+        user = User.objects.create_user(
+            username=username,
+            email=instance.email,
+            password=password
+        )
+
+        student_group, _ = Group.objects.get_or_create(name="StudentGroup")
+        user.groups.add(student_group)
+
+        print(f"User: {user.username}\tPassword: {password}")
+        instance.user = user
+        instance.save()