Django JSON field in forms

Question

here's my problem.I'm trying to create product variants which contain attribute values of the selected product. I'm trying to use JSONField to do that but I was wondering how I could dynamically display the fields in the form for creating new product variants.

Here is my models.py file:

class Product(models.Model) :
    name = models.CharField(max_length=120)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    image = models.ImageField(upload_to='products')
    allow_variants = models.BooleanField(default=True)
    product_attributes = models.ManyToManyField("attribute")

    def __str__(self) :
        return self.name

    class Meta :
        ordering = ("name",)

class Attribute(models.Model) :
    name = models.CharField(max_length=120)

    def __str__(self) :
        return self.name

    def get_all_attr_variants(self) :
        variants = AttributeVariant.objects.filter(attribute__name=self.name)
        return variants

class AttributeVariant(models.Model) :
    name = models.CharField(max_length=120)
    attribute = models.ForeignKey(Attribute, on_delete=models.CASCADE)

    def __str__(self) :
        return self.name

    class Meta :
        ordering = ('name',)

class ProductVariant(models.Model) :
    product = models.ForeignKey(Product, on_delete=models.CASCADE)
    name = models.CharField(max_length=120)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    attributes = JSONField()

    def __str__(self) :
        return self.product.name + ": " + self.name

    class Meta :
        ordering = ("product.name", "name")

Please help me if you have any idea of how I could solve this problem!
Thanks