How to create such models?

Question

Django

I have the following structure:

class Profile(models.Model):
    name = models.CharField(max_length=128)


class Characteristic(models.Model):
    name = models.CharField(max_length=128)


class ProfileCharacteristic(models.Model):
    profile = models.ForeignKey('profiles.Profile', on_delete=models.CASCADE, related_name='profile_characteristics')
    characteristic = models.ForeignKey('characteristic.Characteristic', on_delete=models.CASCADE, related_name='profile_characteristics')
    # следующие поля я б хотел упростить/изменить
    value_text = models.TextField(null=True)
    value_number = models.FloatField(null=True)
    value_range = ArrayField(models.FloatField(), size=2, null=True)
    value_list = ArrayField(models.CharField(max_length=128), null=true)

In other words, there is a profile that is formed by a combination of characteristics and their valid values ​​(number, range, list). Then that profile is assigned to some product.
For example, for paper.
Characteristics:

• White
  
• Brightness
  

Profile:
Class A :

• Brightness: 98-112
  
• Whiteness: 164-169
  

Class B :

• Brightness: 94-95
  
• Whiteness: 160-163
  

Hope the point is clear. Now to the question. How can I simplify (make better) relationships in models?

Answer 1

you do as you can, and after profiling, you will change at the
same time and you will master walking on migrations