Re: ERD2W and EOGeneralAdaptorException
Re: ERD2W and EOGeneralAdaptorException
- Subject: Re: ERD2W and EOGeneralAdaptorException
- From: David LeBer <email@hidden>
- Date: Mon, 03 Jun 2013 18:01:35 -0400
Tim,
Have you checked all of the usual suspects for optimistic locking problems in your model?
Locking on blobs and timestamps are the two that come to mind.
We've run D2W apps in production for ages without these kinds of problems, so it is not a widespread issue that needs an across the board fix.
D
--
David LeBer
Codeferous Software
On 2013-06-03, at 5:50 PM, Tim Worman <email@hidden> wrote:
> Ramsey:
>
> Thanks much. I'll check out freshness explorer.
>
> What do you do for D2W typically? Clobber all fetches with a rule and have it always refreshRefetchedObjects for everything or do you typically only put a rule in for certain views and relationships?
>
> Tim
>
> On Jun 3, 2013, at 1:19 PM, Ramsey Gurley <email@hidden> wrote:
>
>>
>> On Jun 3, 2013, at 12:06 PM, Tim Worman wrote:
>>
>>> an optimistic locking problem I believe. If I kick a new instance everything is fine.
>>
>> That sounds like you need to refreshRefetchedObjects on your fetch spec. If you've previously fetched a row, and then another instance changes that same row, then you fetch the row again in the first instance, the snapshot is not refreshed unless you tell it do so explicitly.
>>
>> With the default false value for refreshRefetchedObjects, you can actually fetch with a qualifier q, and then filter your fetched array with q in memory and get a smaller array of results.
>>
>> I suggest playing around with the freshness explorer app for a few minutes. I found the results to be eye opening.
>>
>> https://github.com/nullterminated/ponder/blob/master/ERR2d2w/Support/FreshnessExplorer.zip
>>
>> Ramsey
>>
>
>
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