Hi,
Just so it's clear for anyone having the same issue, Anthony's tip was 
right on target. All is working now.
Conclusion: you must use the update_record(field=new_value) format if 
you're using authentication, and not the update_record() format.

Thanks again to all that chipped in and Anthony for the solution.

Ricardo.

On Tuesday, January 10, 2017 at 11:43:27 AM UTC, Ricardo Oliveira wrote:
>
> Ah.. that should explain it then. In that case I'll have to do an update 
> call with each of the update fields named individually.
> That would be something nice to have in the book, I agree :)
>
> Thanks Anthony, I'm going to test it now.
>
> On Monday, January 9, 2017 at 10:10:23 PM UTC, Anthony wrote:
>>
>> record = db(db.table_x.id == row_id).select().first()
>>> record['name'] = 'something else'
>>> record.update_record()
>>>
>>> That's the one way you cannot do it. The problem is when you call 
>> .update_record() with no arguments, it takes all the existing fields in the 
>> record and uses them in the database update. It will therefore use the 
>> existing values of modified_by and modified_on. Typically, modified_by and 
>> modified_on get updated because they are excluded from the update call, 
>> which prompts the DAL to fill their values in automatically. But this 
>> mechanism breaks down when calling .update_record() with no arguments. We 
>> should probably add a note about this in the book.
>>
>> Anthony
>>
>

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