can i use default argument on foreignkey?

Question

i added a str default to foreign key but when i tried to create superuser i got error with this argument :

 ValueError: Field 'id' expected a number but got 'personal'.

heres my code :

class Genders(models.Model):
    get_gender = models.TextField()

class CustomUser(AbstractUser):
    age = models.PositiveIntegerField(null=True,validators=[
        MaxValueValidator(100),MinValueValidator(6)])

    gender = models.ForeignKey(Genders,default='personal',on_delete=models.CASCADE)

can you help with this problem ? im learning django cant debug yet but i thought maybe problem is that superuser doesnt have a gender value

yes it is but didnt modify Gender Class thought i can do it later — Nicolas_Darksoul, Dec 14 '22 at 16:20
Try this then `gender = models.ForeignKey(Genders,default = Genders.objects.get(get_gender='personal').id,on_delete=models.CASCADE)` — Thierno Amadou Sow, Dec 14 '22 at 16:23
I want also to add that the `get_gender` should be just a `CharField` — Thierno Amadou Sow, Dec 14 '22 at 16:26
just trying to add personal to query got this :'```raise self.model.DoesNotExist( users.models.Genders.DoesNotExist: Genders matching query does not exist.``` — Nicolas_Darksoul, Dec 14 '22 at 16:45
So that means that you did not add personal in your model Genders — Thierno Amadou Sow, Dec 14 '22 at 16:48
thanks for help my bad i should back and study python again first — Nicolas_Darksoul, Dec 14 '22 at 17:11
Does this answer your question? [Setting default value for Foreign Key attribute](https://stackoverflow.com/questions/9311996/setting-default-value-for-foreign-key-attribute) — Abdul Aziz Barkat, Dec 15 '22 at 04:37
@ThiernoAmadouSow please don't advise people to run queries on the module level, no queries should be run before Django has initialized all apps, etc. Hence all queries need to go in functions / methods. — Abdul Aziz Barkat, Dec 15 '22 at 04:40

score 1 · Answer 1 · answered Dec 15 '22 at 04:23

You need to pass ID not a gender name because ForeignKey needs to ID not a gender name

    class Genders(models.Model):
        get_gender = models.TextField()

    class CustomUser(AbstractUser):
        age = models.PositiveIntegerField(null=True,validators=[
            MaxValueValidator(100),MinValueValidator(6)])
    
        gender = models.ForeignKey(Genders,default='1',on_delete=models.CASCADE)

can i use default argument on foreignkey?

1 Answers1