That was my first thought: in some cases, another request deletes the
record right in the instant between the execution of the first and second
line.
But I thought it wasn't possible because the function runs inside a db
transaction. Or could it still happen?
Another thought is that the row.id is removed or set to None by
row.update_record(**data), so the next line would set row to None, thus
triggering the error.
But I'm not sure how could that happen. I checked and the "data" dictionary
hasn't got the "id" key (I mean, the id field isn't updated).
Anyway, what I'm going to do to catch the error is this:
row.update_record(**data)
if not row:
return response.json({'success':False})
row.update_tsv()
This way I'll avoid the error ticket for those few cases.
I guess I could also decompile a couple of apps and put a log line there,
though I don't know exactly what to log.
El jueves, 19 de julio de 2018, 10:56:55 (UTC-3), Anthony escribió:
>
> On Thursday, July 19, 2018 at 4:26:09 AM UTC-4, Lisandro wrote:
>>
>> Well, I owe you an apology, because I got confused regarding which app
>> was throwing the error and which web2py version was running.
>>
>> Until recently, I was using a very old web2py version (2.10). This
>> problem was happening since long time ago (but not very frequently as I
>> stated). For that old web2py version, I had already applied the fix to my
>> app:
>>
>> row.update_record(**data)
>> row = db.content[row.id]
>> row.update_tsv()
>>
>
> There must still be something else going on that we're not seeing. Even in
> web2py 2.10, there would have been no way to get the error in question, as
> the .update_record method could not turn a Row object into None.
>
> I suppose the above code could generate this error if the record in
> question could be deleted in a separate HTTP request in between the
> execution of the first and second lines above. Is that possible (i.e., is
> there some other action that could be deleting existing records)?
>
> Anthony
>
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