solved task

.gitignore

@@ -7,3 +7,5 @@ venv/
 .pytest_cache/
 **__pycache__/
 **db.sqlite3
+.venv/
+.venv

car/migrations/0001_initial.py

@@ -0,0 +1,26 @@
+# Generated by Django 4.1 on 2026-03-04 22:19
+
+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

@@ -1,5 +1,40 @@
+from django.core.validators import (
+    MinValueValidator,
+    MaxValueValidator
+)
 from rest_framework import serializers
 
+from car.models import Car
+
 
 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(
+        validators=[MinValueValidator(1), MaxValueValidator(1914)]
+    )
+    is_broken = serializers.BooleanField(default=False)
+    problem_description = serializers.CharField(required=False)
+
+    def create(self, validated_data):
+        return Car.objects.create(**validated_data)
+
+    def update(self, instance, validated_data):
+        instance.manufacturer = validated_data.get(
+            "manufacturer", instance.manufacturer
+        )
+        instance.model = validated_data.get(
+            "model", instance.model
+        )
+        instance.horse_power = validated_data.get(
+            "horse_power", instance.horse_power
+        )
+        instance.is_broken = validated_data.get(
+            "is_broken", instance.is_broken
+        )
+        instance.problem_description = validated_data.get(
+            "problem_description", instance.problem_description
+        )
+        instance.save()
+        return instance

main.py

@@ -1,9 +1,20 @@
+import io
 from car.models import Car
+from car.serializers import CarSerializer
+from rest_framework.renderers import JSONRenderer
+from rest_framework.parsers import JSONParser
 
 
 def serialize_car_object(car: Car) -> bytes:
-    pass
+    serializer = CarSerializer(car)
+    json = JSONRenderer().render(serializer.data)
+    return json
 
 
 def deserialize_car_object(json: bytes) -> Car:
-    pass
+    stream = io.BytesIO(json)
+    data = JSONParser().parse(stream)
+    serializer = CarSerializer(data=data)
+    serializer.is_valid(raise_exception=True)
+    car = serializer.save()
+    return car