CarSerializer implementation: all tests passed

car/migrations/0001_initial.py

@@ -0,0 +1,26 @@
+# Generated by Django 6.0.2 on 2026-03-11 15:16
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Car',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('manufacturer', models.CharField(max_length=64)),
+                ('model', models.CharField(max_length=64)),
+                ('horse_powers', models.PositiveSmallIntegerField(validators=[django.core.validators.MaxValueValidator(1914), django.core.validators.MinValueValidator(1)])),
+                ('is_broken', models.BooleanField()),
+                ('problem_description', models.TextField(blank=True, null=True)),
+            ],
+        ),
+    ]

car/serializers.py

@@ -2,4 +2,15 @@
 
 
 class CarSerializer(serializers.Serializer):
-    pass
+    id = serializers.IntegerField(read_only=True)
+    manufacturer = serializers.CharField(max_length=64)
+    model = serializers.CharField(max_length=64)
+    horse_powers = serializers.IntegerField(
+        min_value=1,
+        max_value=1999,
+    )
+    is_broken = serializers.BooleanField()
+    problem_description = serializers.CharField(
+        allow_null=True,
+        required=False,
+    )

main.py

@@ -1,9 +1,24 @@
+import json
 from car.models import Car
+from car.serializers import CarSerializer
 
 
 def serialize_car_object(car: Car) -> bytes:
-    pass
+    serializer = CarSerializer(car)
+    return json.dumps(serializer.data, separators=(",", ":")).encode("utf-8")
 
 
-def deserialize_car_object(json: bytes) -> Car:
-    pass
+def deserialize_car_object(json_bytes: bytes) -> Car:
+    data = json.loads(json_bytes.decode("utf-8"))
+
+    serializer = CarSerializer(data=data)
+    serializer.is_valid(raise_exception=True)
+
+    validated = serializer.validated_data
+
+    car = Car(**validated)
+
+    if "id" in data:
+        car.id = data["id"]
+
+    return car