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From Luis Miguel Silva <luismiguelferreirasi...@gmail.com>
Subject Re: Update conflicts?
Date Tue, 05 Apr 2011 22:41:37 GMT
More or less!

The most common scenario will be:
- two or more processes writing to the same document, but only to a
specific attribute (not overwriting the whole document)

If, by any chance, two processes overwrite the same field, i'm ok with
the last one always winning.

Thanks,
Luis

On Tue, Apr 5, 2011 at 4:26 PM, Robert Newson <robert.newson@gmail.com> wrote:
> "Ideally, we would be able to update without specifying the _rev, just
> posting (or, in this case PUTting) to the document..."
>
> So you want to blindly overwrite some unknown data?
>
> B.
>
> On 5 April 2011 22:57, Zachary Zolton <zachary.zolton@gmail.com> wrote:
>> Luis,
>>
>> Checkout _update handlers:
>>
>> http://wiki.apache.org/couchdb/Document_Update_Handlers
>>
>>
>> Cheers,
>>
>> Zach
>>
>> On Tue, Apr 5, 2011 at 4:46 PM, Luis Miguel Silva
>> <luismiguelferreirasilva@gmail.com> wrote:
>>> Dear all,
>>>
>>> I'm trying to play around with updates and i'm bumping into some problems.
>>>
>>> Let's image we have to clients that poll a document from the server at
>>> the same time and get the same _rev.
>>> Then one of them updates the doc based on the _rev it got:
>>> [root@xkitten ~]# curl -X PUT -d
>>> '{"_rev":"3-0d519bcf08130bf784f3c35d79760740","hello2":"fred2"}'
>>> http://localhost:5984/benchmark/test?conflicts=true
>>> {"ok":true,"id":"test","rev":"4-03640ebafbb4fcaf127844671f8e2de7"}
>>> Then another one tries to update the doc based on the same exact _rev:
>>> [root@xkitten ~]# curl -X PUT -d
>>> '{"_rev":"3-0d519bcf08130bf784f3c35d79760740","hello3":"fred3"}'
>>> http://localhost:5984/benchmark/test?conflicts=true
>>> {"error":"conflict","reason":"Document update conflict."}
>>> [root@xkitten ~]#
>>>
>>> Is there a way to avoid this?! (like...make the update just create a
>>> new _rev or something)??
>>>
>>> Ideally, we would be able to update without specifying the _rev, just
>>> posting (or, in this case PUTting) to the document...
>>>
>>> Thoughts??
>>>
>>> Thank you,
>>> Luis
>>>
>>
>

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