Solution

cinema/serializers.py

@@ -8,73 +8,20 @@ class Meta:
         model = Movie
         fields = ["id", "title", "description", "duration"]
 
-    def create(self, validated_data):
-        return Movie.objects.create(**validated_data)
-
-    def update(self, instance, validated_data):
-        instance.title = validated_data.get("title", instance.title)
-        instance.description = validated_data.get(
-            "description", instance.description
-        )
-        instance.duration = validated_data.get("duration", instance.duration)
-
-        instance.save()
-
-        return instance
-
 
 class ActorSerializer(serializers.ModelSerializer):
     class Meta:
         model = Actor
         fields = "__all__"
 
-    def create(self, validated_data):
-        return Actor.objects.create(**validated_data)
-
-    def update(self, instance, validated_data):
-        instance.first_name = validated_data.get(
-            "first_name", instance.first_name
-        )
-        instance.last_name = validated_data.get(
-            "last_name", instance.last_name
-        )
-
-        instance.save()
-
-        return instance
-
 
 class GenreSerializer(serializers.ModelSerializer):
     class Meta:
         model = Genre
         fields = "__all__"
 
-    def create(self, validated_data):
-        return Genre.objects.create(**validated_data)
-
-    def update(self, instance, validated_data):
-        instance.name = validated_data.get("name", instance.name)
-
-        instance.save()
-
-        return instance
-
 
 class CinemaHallSerializer(serializers.ModelSerializer):
     class Meta:
         model = CinemaHall
         fields = "__all__"
-
-    def create(self, validated_data):
-        return CinemaHall.objects.create(**validated_data)
-
-    def update(self, instance, validated_data):
-        instance.name = validated_data.get("name", instance.name)
-        instance.rows = validated_data.get("rows", instance.rows)
-        instance.seats_in_row = validated_data.get(
-            "seats_in_row", instance.seats_in_row
-        )
-
-        instance.save()
-
-        return instance