Django Choices based on Foreign Key

Question

I am wondering if there is a way to use a list that is stored in a foreignkey as the choices for a charfield.

Here is what I have right now but it is not working.

priority = models.ForeignKey(SLAs)
prioritylevel = models.CharField(choices=priority.details)

It says that the ForeignKey has no attribute 'details'

If this has been answered, please point me the correct direction.

Thanks :)

Can you explain why you would want to do this? You can always access the data via `priority.details`, I don't understand why you need to copy it to another model. — Daniel Roseman, Feb 15 '14 at 18:57
In the foreignkey there is a list that would define a choice drop which would be in details — icebox3d, Feb 15 '14 at 18:59

score 4 · Accepted Answer · answered Feb 15 '14 at 19:22

4

I think you want use this in forms?

So you can do smth like this:

class MyForm(forms.ModelForm):
    prioritylevel = forms.ModelChoiceField(queryset=OtherModel.objects.values('level'))

and in model this will just CharField. It this solve your problem?

answered Feb 15 '14 at 19:22

Andrey Nelubin

{'name':'Jonh'} How to get only value Jonh? – Chanrithisak Phok Feb 15 '20 at 12:40
1

@PhokChanrithisak use ```.values_list('name', flat=True)``` then – Andrey Nelubin Feb 17 '20 at 05:02

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