Выбор для каждого элемента в поле в моделях

            class Sports(models.Model):
                Sport=models.CharField(max_length=30)

            class User(models.Model):
                user=models.CharField(max_length=30)

            class Intrest(models.Model):
                user_name=models.Foreignkey(User,on_delete=models.CASCADE)
                sport=models.Foreignkey(Sports,on_delete=models.CASCADE)
                LEVEL=(
                    ('1','Beginer'),
                    ('2','Intermediate'),
                    ('3','Advance'),
                    ('4','Nevel Played'),