My understanding of the error is that i can not subtract strings, which is
true, but these fiends on which i am performing subtraction are dates and i
was trying to pick their days when i put them into* ().days *so they wont
be treated as strings because they are date fields, i cant figure out why
it is not working!
On Tuesday, August 13, 2019 at 2:26:17 PM UTC+2, villas wrote:
>
> Check in DB what kind of field is '*daysLoaned*'. Maybe it is defined as
> a Str field?
> Try: Field('daysLoaned', compute=lambda r:
> str(r['returning_date']-r['loaning_date']).days)
> Just an idea...
>
>
>
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