Is this the kind of thing you're looking for?
https://github.com/openwisp/openwisp-firmware-upgrader/tree/1e9fa26d75a48ae9274c2708ea9a10134a2bb9d0/openwisp_firmware_upgrader/base/admin.py#L150-L186
Fed
On Wednesday, April 15, 2020 at 4:15:48 PM UTC-5, Gagan Deep wrote:
>
> Greetings of the day,
>
> I have defined a model admin inheriting from admin.ModelAdmin class. There
> is one of the fields which I want to show on the admin dashboard which is a
> function. I read in Django docs that for a callable function to be a field,
> it should be added in readonly_fields. So far, it was working great. The
> problem arose when I mentioned that callable field in the fieldset.
>
> This worked fine:
> class Myadmin(admin.ModelAdmin):
> readonly_fields = ('my_callable_field', )
> fields = ('my_callable_field' )
>
>
> But, doing this popped Unknown field(s) (my_callable_field) specified for
> <model>. Check fields/fieldsets/exclude attributes of class Myadmin
> class Myadmin(admin.ModelAdmin):
> readonly_fields = ('my_callable_field', )
> fieldsets = (
> (None, {'fields': ('my_callable_field',)}),
> )
>
> I don't understand why this is happening.
>
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