How to save a new object through a serializer with a nested serializer?

Question

Django

So the models are:

class Survey(models.Model):
    name = models.CharField(max_length=255, help_text="input survey name", verbose_name='survey name')
    description = models.TextField(blank=True,
                                   help_text="input description")
    creator = models.ForeignKey(User, models.CASCADE, help_text="creator survey")
    unique_url = models.CharField(max_length=200, null=True, unique=True, verbose_name='url')
    is_active = models.BooleanField(null=False, default=False)
    is_anonymous = models.BooleanField(null=False, default=False)
    have_answers = models.BooleanField(default=False)
    statuses = models.ManyToManyField(User, through='Status', related_name='statuses')
    created_at = models.DateTimeField(auto_now_add=True,null=True)
    answers_count = models.IntegerField(default=0)
    expiration_date = models.DateField(null=True, default=None, blank=True)

    class Meta:
        verbose_name = 'Опрос'

    def __str__(self):
        return "Survey. Name: %s, Description: %s" % (
            self.name, self.description)

class Question(models.Model):
    title = models.TextField(help_text="question title")
    required = models.BooleanField(null=False, default=False)
    survey = models.ForeignKey(Survey, models.CASCADE)
    def __str__(self):
        return "Question. Title: %s" % self.title

Serializers:

class QuestionSerializer(serializers.ModelSerializer):
    # answers = AnswerSerializer(many=True)
    title = serializers.CharField()
    required = serializers.BooleanField()
    survey = serializers.IntegerField(required=False)
    class Meta:
        model = Question
        fields = ('title',
                  'required',
                  'survey',
                  )

class SurveyCreateSerializer(serializers.ModelSerializer):
    questions = QuestionSerializer(many=True)
    class Meta:
        model = Survey
        fields = ('name',
                  'description',
                  'is_active',
                  'is_anonymous',
                  'expiration_date',
                  'questions'
                  )
    def generate_uuid(self):
        data = uuid.uuid4().hex
        return data
    def create(self, validated_data):
        questions = validated_data.pop('questions',[])
        validated_data['unique_url'] = self.generate_uuid()
        validated_data['creator'] = self.context['request'].user
        survey = Survey.objects.create(**validated_data)
        for question in questions:
            Question.objects.create(**question,survey=survey)
        return survey

view

class SurveyView(generics.CreateAPIView):
    serializer_class = SurveyCreateSerializer
    permission_classes = [IsAuthenticated]
    def generate_url(self):
        data = uuid.uuid4().hex
        return data
    def create(self, request, *args, **kwargs):
        survey_serializer = SurveyCreateSerializer(data=request.data,context={'request':request})
        survey_serializer.is_valid(raise_exception=True)
        self.perform_create(survey_serializer)
        headers = self.get_success_headers(survey_serializer.data)
        return Response(survey_serializer.data,status.HTTP_201_CREATED,headers=headers)

Error when passing data to controller:
Got AttributeError when attempting to get a value for field `questions` on serializer `SurveyCreateSerializer`.
The serializer field might be named incorrectly and not match any attribute or key on the `Survey` instance.
Original exception text was: 'Survey' object has no attribute 'questions'.
I do not understand how to solve, explain what is wrong.