Perfect solution for me; somehow didn't think about it - 
Thank you! 

On Tuesday, July 14, 2020 at 2:51:59 AM UTC-4, AGRogers wrote:
>
> Can you add a virtual field to the Cart table to do the counting for you? 
>
> On Tue, 14 Jul 2020, 4:34 pm Vlad, <[email protected] <javascript:>> 
> wrote:
>
>> The following doesn't work: 
>>
>>     fields = [db.cart.id, db.cart.id.count()]
>>
>>
>>     grid = SQLFORM.grid(db.cart,
>>                         fields=fields,
>>                         left = [db.cart_content.on(db.cart.id==db.
>> cart_content.cart)],
>>                         groupby=db.cart.id)
>>
>> what's the best way to accomplish this? 
>> I simply wan to count how many items in each cart. 
>> logically db.car.id.count() should really work here, but it doesn't.
>>
>> greatly appreciate any suggestions on how to do this properly. 
>>
>> -- 
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>> - http://web2py.com/book (Documentation)
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>

-- 
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- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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