From 337aacb4d3cd0d2b06ba066d8a61fe7bf5a605a0 Mon Sep 17 00:00:00 2001
From: pawunder1992 <pavelkryvutsa@gmail.com>
Date: Fri, 15 May 2026 15:19:25 +0300
Subject: [PATCH 1/2] updated serializers.py and main.py

---
 car/migrations/0001_initial.py | 41 ++++++++++++++++++++++++++++++++++
 car/serializers.py             | 24 +++++++++++++++++++-
 main.py                        | 17 +++++++++++---
 3 files changed, 78 insertions(+), 4 deletions(-)
 create mode 100644 car/migrations/0001_initial.py

diff --git a/car/migrations/0001_initial.py b/car/migrations/0001_initial.py
new file mode 100644
index 00000000..d0d4b1e7
--- /dev/null
+++ b/car/migrations/0001_initial.py
@@ -0,0 +1,41 @@
+# Generated by Django 4.1 on 2026-05-15 12:12
+
+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)),
+            ],
+        ),
+    ]
diff --git a/car/serializers.py b/car/serializers.py
index 3026b2b3..a155f431 100644
--- a/car/serializers.py
+++ b/car/serializers.py
@@ -1,5 +1,27 @@
 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(
+        min_value=1,
+        max_value=1914
+    )
+    is_broken = serializers.BooleanField()
+    problem_description = serializers.CharField(required=False)
+
+    def create(self, validated_data):
+        return Car.objects.create(**validated_data)
+
+    def update(self, instance, validated_data):
+        instance.id = validated_data.get("id", instance.id)
+        instance.manufacturer = validated_data.get("manufacturer", instance.manufacturer)
+        instance.model = validated_data.get("model", instance.model)
+        instance.horse_powers = validated_data.get("horse_powers", instance.horse_powers)
+        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
diff --git a/main.py b/main.py
index c8ff592b..2643a3f3 100644
--- a/main.py
+++ b/main.py
@@ -1,9 +1,20 @@
+import io
+
+from rest_framework.parsers import JSONParser
+from rest_framework.renderers import JSONRenderer
+
 from car.models import Car
+from car.serializers import CarSerializer
 
 
 def serialize_car_object(car: Car) -> bytes:
-    pass
-
+    serializer = CarSerializer(car)
+    return JSONRenderer().render(serializer.data)
 
 def deserialize_car_object(json: bytes) -> Car:
-    pass
+    stream = io.BytesIO(json)
+    data = JSONParser().parse(stream)
+    serializer = CarSerializer(data=data)
+    serializer.is_valid()
+    serializer.save()
+    return Car.objects.get(id=data["id"])

From 0325657501dc293456a242c6787ed614b7729f60 Mon Sep 17 00:00:00 2001
From: pawunder1992 <pavelkryvutsa@gmail.com>
Date: Fri, 15 May 2026 15:25:54 +0300
Subject: [PATCH 2/2] fixed problems with flake8

---
 car/serializers.py | 16 ++++++++++++----
 main.py            |  1 +
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/car/serializers.py b/car/serializers.py
index a155f431..cceee0dd 100644
--- a/car/serializers.py
+++ b/car/serializers.py
@@ -18,10 +18,18 @@ def create(self, validated_data):
 
     def update(self, instance, validated_data):
         instance.id = validated_data.get("id", instance.id)
-        instance.manufacturer = validated_data.get("manufacturer", instance.manufacturer)
+        instance.manufacturer = validated_data.get(
+            "manufacturer",
+            instance.manufacturer)
         instance.model = validated_data.get("model", instance.model)
-        instance.horse_powers = validated_data.get("horse_powers", instance.horse_powers)
-        instance.is_broken = validated_data.get("is_broken", instance.is_broken)
-        instance.problem_description = validated_data.get("problem_description", instance.problem_description)
+        instance.horse_powers = validated_data.get(
+            "horse_powers",
+            instance.horse_powers)
+        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
diff --git a/main.py b/main.py
index 2643a3f3..126b2c47 100644
--- a/main.py
+++ b/main.py
@@ -11,6 +11,7 @@ def serialize_car_object(car: Car) -> bytes:
     serializer = CarSerializer(car)
     return JSONRenderer().render(serializer.data)
 
+
 def deserialize_car_object(json: bytes) -> Car:
     stream = io.BytesIO(json)
     data = JSONParser().parse(stream)