Не получается вывести список на django rest framework?

Question

[Maruf]

Хочу вывести список, но выдает ошибку

'Type' object has no attribute 'typeram'

Models.py

class Frequency(models.Model):
    title = models.IntegerField(verbose_name='Частота ОЗУ',default=3200)

    def __str__(self):
        return f'{self.title}'

    class Meta:
        verbose_name = 'Частота ОЗУ'
        verbose_name_plural = 'Добавить Частоту ОЗУ'

class Type(models.Model):
    title = models.CharField(verbose_name='Тип ОЗУ',max_length=10, default='DDR4')

    def __str__(self):
        return f'{self.title}'

    class Meta:
        verbose_name = 'Тип ОЗУ'
        verbose_name_plural = 'Добавить ОЗУ'

class Ram(models.Model):
    title = models.CharField(verbose_name='Название',max_length=20)
    image = models.ImageField(verbose_name='Изображение',upload_to='Image/Ram_Image')

    RamIncluded = models.IntegerField(verbose_name='Количество Плашек',default=2)
    OneRam = models.IntegerField(verbose_name='Количество Памяти',default=8) 
    typeram = models.ManyToManyField(Type, verbose_name='Тип ОЗУ')
    Ramfrequency = models.ManyToManyField(Frequency,verbose_name='Частота ОЗУ')

    def __str__(self):
        return f'{self.title}'

    class Meta:
        verbose_name = 'ОЗУ'
        verbose_name_plural = 'Добавить ОЗУ'

serializers.py

class FrequencyListSerializer(serializers.ModelSerializer):
    class Meta:
        model = Frequency
        fields = '__all__'

class TypeListSerializer(serializers.ModelSerializer):
    class Meta:
        model = Type
        fields = '__all__'

class RamListSerializer(serializers.ModelSerializer):
    typeram = serializers.SerializerMethodField(source='get_Type')
    Ramfrequency = serializers.SerializerMethodField(source='get_Ramfrequency')

    class Meta:
        model = Ram
        fields = '__all__'

    def get_Ramfrequency(self, obj):
        return FrequencyListSerializer(obj.Ramfrequency, many=True).data

    def get_typeram(self, obj):
        return TypeListSerializer(obj.typeram, many=True).data