Solution

db/migrations/0001_initial.py

@@ -0,0 +1,29 @@
+# Generated by Django 4.0.2 on 2024-12-19 21:06
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Actor',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('first_name', models.CharField(max_length=255)),
+                ('last_name', models.CharField(max_length=255)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Genre',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=255)),
+            ],
+        ),
+    ]

db/migrations/0002_alter_genre_name.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.0.2 on 2024-12-19 23:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('db', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='genre',
+            name='name',
+            field=models.CharField(max_length=255, unique=True),
+        ),
+    ]

db/models.py

@@ -1 +1,16 @@
 from django.db import models
+
+
+class Genre(models.Model):
+    name = models.CharField(max_length=255, unique=True)
+
+    def __str__(self):
+        return self.name
+
+
+class Actor(models.Model):
+    first_name = models.CharField(max_length=255)
+    last_name = models.CharField(max_length=255)
+
+    def __str__(self):
+        return f"{self.first_name} {self.last_name}"

main.py

@@ -1,7 +1,65 @@
 import init_django_orm  # noqa: F401
 
 from django.db.models import QuerySet
-
+from db.models import Genre, Actor
 
 def main() -> QuerySet:
-    pass
+    # Create genres
+    genres = [("Western",), ("Action",), ("Dramma",)]
+    for (genre_name,) in genres:
+        Genre.objects.get_or_create(name=genre_name)
+
+    # Create actors
+    actors = [
+        ("George", "Klooney"),
+        ("Kianu", "Reaves"),
+        ("Scarlett", "Keegan"),
+        ("Will", "Smith"),
+        ("Jaden", "Smith"),
+        ("Scarlett", "Johansson"),
+    ]
+    for first_name, last_name in actors:
+        Actor.objects.get_or_create(first_name=first_name, last_name=last_name)
+
+    # Update genre name "Dramma" to "Drama"
+    try:
+        genre = Genre.objects.get(name="Dramma")
+        genre.name = "Drama"
+        genre.save()
+    except Genre.DoesNotExist:
+        print("Genre 'Dramma' not found.")
+
+    try:
+        actor = Actor.objects.get(first_name="George", last_name="Klooney")
+        actor.last_name = "Clooney"
+        actor.save()
+    except Actor.DoesNotExist:
+        print("Actor 'George Klooney' not found.")
+
+    # Update actor Kianu Reaves to Keanu Reeves
+    try:
+        actor = Actor.objects.get(first_name="Kianu", last_name="Reaves")
+        actor.first_name = "Keanu"
+        actor.last_name = "Reeves"
+        actor.save()
+    except Actor.DoesNotExist:
+        print("Actor 'Kianu Reaves' not found.")
+
+    # Delete the genre "Action"
+    try:
+        Genre.objects.filter(name="Action").delete()
+    except Genre.DoesNotExist:
+        print("Genre 'Action' not found.")
+
+    # Delete all actresses with first_name "Scarlett"
+    Actor.objects.filter(first_name="Scarlett").delete()
+
+    # QuerySet of actors with last_name "Smith", ordered by first_name
+    smith_actors = Actor.objects.filter(last_name="Smith").order_by("first_name")
+
+    # Return or print the QuerySet
+    print("Actors with last name 'Smith':")
+    for actor in smith_actors:
+        print(f'{actor.first_name} {actor.last_name}')
+
+    return smith_actors