Bulk import students, bulk change course

techdb/flightslot/models/students.py

@@ -1,5 +1,5 @@
 from django.db import models
-from django.contrib.auth.models import User
+from django.contrib.auth.models import User, Group
 
 from ..models.courses import Course
 
@@ -46,5 +46,35 @@ class Student(models.Model):
         blank=True
     )
 
+    def default_password(self) -> str:
+        return f"{self.name.lower()[0]}{self.surname.lower()}{self.id}"
+
+    # Override save method to add user for login upon Student creation
+    def save(self, *args, **kwargs):
+        creating = self.pk is None
+        super().save(*args, **kwargs)
+        if creating and not self.user:
+            username = f"{self.name.lower()}.{self.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
+            # Create user
+            user = User.objects.create_user(
+                first_name=self.name,
+                last_name=self.surname,
+                username=username,
+                email=self.email,
+                password=self.default_password(),
+                is_staff=True
+            )
+
+            student_group, _ = Group.objects.get_or_create(name="StudentGroup")
+            user.groups.add(student_group)
+            self.user = user
+            self.save()
+
     def __str__(self):
         return f"{self.surname} {self.name[0]}. => {self.course}"