У меня есть кортеж, и я хочу сохранить его в базе данных. как я могу сделать это с помощью django

вот изображение моей базы данных CATEGORY_CHOICES = (('M', 'Mobile'), ('L', 'Laptop'), ('TW', 'Верхняя одежда'), ('BW', 'Нижняя одежда'), ('W', 'Часы'), ('P', 'принтер'), ('F', 'вентилятор'), ('EB', 'наушники'), ('C', 'Камера'), ('O', 'Масло'), ('SH', 'Душ'), ('MU', 'Музели'), ('CL', 'Чистящее средство'), ('CA', 'Компьютер и аксессуары'))

models.py
class Product(models.Model):
    title = models.CharField(max_length=200)
    selling_price = models.FloatField()
    discounted_price = models.FloatField()
    description = models.TextField()
    brand = models.CharField(max_length=100)
    category = models.CharField(choices=CATEGORY_CHOICES, max_length=2)
    product_image = models.ImageField(upload_to='productimg')

    def __str__(self):
        return str(self.id)




views.py
@login_required
def upload_details(request):
    category = CATEGORY_CHOICES
    dict_category = dict(category)
    print("Category", type(category))
    if request.method == "POST":
        product_name = request.POST.get('product-title')
        product_selling_price = request.POST.get('product-selling-price')
        product_discounted_price = request.POST.get('product-discounted-price')
        product_description = request.POST.get('product-description')
        product_brand = request.POST.get('product-brand')
        product_category = request.POST.get('product-category')
        product_main_image = request.FILES['product-main-image']

        print("Product Category", type(product_category))

        save_product = Product(title=product_name, selling_price=product_selling_price,
                               discounted_price=product_discounted_price, description=product_description,
                               brand=product_brand.upper(), category=product_category, product_image=product_main_image)
        save_product.save()
    return render(request, 'app/uploaddetails.html', {'dict_category': dict_category})

views.py
class ProductView(View):
    def get(self, request):
        totalitem = 0
        topwears = Product.objects.filter(category='TW')
        bottomwears = Product.objects.filter(category='BW')
        mobiles = Product.objects.filter(category='M')
        laptops = Product.objects.filter(category='L')
        watch = Product.objects.filter(category='W')
        computer_accessories = Product.objects.filter(category='CA')
        random_watch = list(watch)
        watch_shuffle = random.sample(random_watch, 14)
        random_mobile = list(mobiles)
        mobile_shuffle = random.sample(random_mobile, 9)
        mobile_shuffle_mob = random.sample(random_mobile, 4)
        random_item = list(Product.objects.all())
        item_shuffle = random.sample(random_item, 20)
        if request.user.is_authenticated:
            totalitem = len(Cart.objects.filter(user=request.user))

        return render(request, 'app/home.html', {'topwears': topwears, 'bottomwears': bottomwears, 'mobiles': mobiles, 'laptops': laptops, 'watch': watch, 'computer_accessories': computer_accessories, 'watch_shuffle': watch_shuffle, 'mobile_shuffle': mobile_shuffle, 'mobile_shuffle_mob': mobile_shuffle_mob, 'item_shuffle': item_shuffle, 'totalitem': totalitem})

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