Django : Foreign Key to a choice field model - django

Question

I am relatively new to Python / Django.
I am trying to create a relationship between food items and the category (name)
they belong:
class Category(models.Model):
options=(
('vegetable','vegetable'),
('fruit','fruit'),
('carbs','carbs'),
('fish','fish'),
('meat', 'meat'),
('sweet', 'sweet'),
('dairy', 'dairy'),
)
name=models.CharField(max_length=10,choices=options,unique=True)
def __str__(self):
return self.name
class Fooditem(models.Model):
name = models.CharField(max_length=50)
category = models.ForeignKey(Category,on_delete=models.CASCADE)
The code above throws error when running migrate:
ValueError: invalid literal for int() with base 10: 'vegetable'
I created some items in the database, is it the reason?
What is the best way to solve this problem?
Thank you,
D

Answer 1

It would fix it, but you may have some unexpected results.
category = models.ForeignKey(Category,on_delete=models.CASCADE)
will be an id pointing to the other model.
You can make name the primary key by changing it to the following:
name=models.CharField(max_length=10,choices=options,unique=True,primary_key=True)
Also reviewing https://docs.djangoproject.com/en/3.1/ref/models/fields/#choices more closely may help you with your options down the road. It will programming easier to define as costants and follow thier syntaxing

Answer 2

I would realy recommend u to do it this way. if there is something that is unclear just let me know
class Category(models.TextChoices):
vegetable='vegetable'
fruit='fruit'
carbs='carbs'
fish='fish'
meat='meat'
sweet='sweet'
dairy='dairy'
class Fooditem(models.Model):
name = models.CharField(max_length=50)
category = models.CharField(max_length=20, choices=Category.choices)```