Re: weird "must be an intance" error

[Bobby Roberts]

haha Thanks for that... i never would have figured it out




On Apr 18, 4:59 pm, akaariai  wrote:
> On Apr 18, 11:38 pm, Bobby Roberts  wrote:
>
> > oops... forgot to clarify that Item.tid is a FK to printLocation
>
> Then you would want to assign to tid_id. For foreign keys the tid
> wants an instance, the tid_id can be assigned the "db value" for that
> foreign key. I am not sure if the tid_id can be named something else.
> If it can be, you can find out the right field name to assign to by
> checking out ItemTracking._meta.get_field_by_name('tid')[0].attname in
> the django shell.
>
>  - Anssi

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Re: weird "must be an intance" error

[akaariai]

On Apr 18, 11:38 pm, Bobby Roberts  wrote:
> oops... forgot to clarify that Item.tid is a FK to printLocation

Then you would want to assign to tid_id. For foreign keys the tid
wants an instance, the tid_id can be assigned the "db value" for that
foreign key. I am not sure if the tid_id can be named something else.
If it can be, you can find out the right field name to assign to by
checking out ItemTracking._meta.get_field_by_name('tid')[0].attname in
the django shell.

 - Anssi

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Re: weird "must be an intance" error

[Bobby Roberts]

oops... forgot to clarify that Item.tid is a FK to printLocation

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Re: weird "must be an intance" error

[akaariai]

On Apr 18, 11:03 pm, Bobby Roberts  wrote:
> considering this snippet:
>
> valPrintlocation=int(request.POST.get('printlocation'))
>                         if valPrintlocation==-1:
>                                 needsprinting=0
>                         else:
>                                 needsprinting=1
>
>                         Item = ItemTracking.objects.get(Barcode =
> barcode)
>                         Item.tid=valPrintlocation
>                         Item.NeedsPrinting=needsprinting
>                         ...
>
> can you see any reason i'm getting this error:
>
> Cannot assign "-1": "ItemTracking.tid" must be a "printLocation"
> instance.
>
> I get the same error regardless of the value of valPrintlocation

It would help if you would include the definition of ItemTracking at
least. Based on that snippet I would guess the problem is that
ItemTracking.tid must be a printLocation instance... :)

 - Anssi

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weird "must be an intance" error

[Bobby Roberts]

considering this snippet:


 
valPrintlocation=int(request.POST.get('printlocation'))
if valPrintlocation==-1:
needsprinting=0
else:
needsprinting=1

Item = ItemTracking.objects.get(Barcode =
barcode)
Item.tid=valPrintlocation
Item.NeedsPrinting=needsprinting
...

can you see any reason i'm getting this error:

Cannot assign "-1": "ItemTracking.tid" must be a "printLocation"
instance.


I get the same error regardless of the value of valPrintlocation

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