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From: Wordit Ltd <wordituk@googlemail.com>
Date: Thu, 11 Nov 2010 21:00:45 +0100
Message-ID: <AANLkTincoN0cUGDL45eD8En7AYr4cP19BS89GS2ABwJV@mail.gmail.com>
Subject: Re: Update handler doc ids
To: user@couchdb.apache.org
Content-Type: text/plain; charset=UTF-8

Zach,

Thanks for the confirmation on the doc ID. I need to update a doc
belonging to the logged in user. If I use a field like "owner":
"username" then I would need to find the doc ID first. Don't you lose
the advantage of an update handler by first doing a read request?

I mean you might as well do a standard read then a write. Two calls.
Update handlers have the advantage of a single db call, or not?

To use an update handler, I need the ID. I figured that if I set the
doc ID to be the username, which is unique, then I can send the
username as the doc ID to the update handler. Is there anything wrong
with that approach?

Marcus


On Thu, Nov 11, 2010 at 8:45 PM, Zachary Zolton
<zachary.zolton@gmail.com> wrote:
>
> Update handlers can't query the database nor access external
> resources. They just update or create a single document based on the
> HTTP request (and the current document object, in the case of updating
> an existing document).
>
> Moreover, if you want to update a document, you'll need to provide the
> ID. So, you can either construct the ID from variables available at
> that point in your program, or make a query to find the doc ID before
> calling your update handler.
>
> Give this a read:
> http://wiki.apache.org/couchdb/Document_Update_Handlers
>
> If you provide more background about your scenario, I can give you
> more explicit advice.
>
>
> Cheers,
>
> Zach
>
>
> On Thu, Nov 11, 2010 at 8:59 AM, Wordit Ltd <wordituk@googlemail.com> wrote:
>> Do update handlers require the doc id, or is it possible to search for
>> the doc as with views?
>>
>> I need to update the document belonging to the logged in user. (I'll
>> use a validation function to check that.)
>> The only workaround I could think of is using the username as the doc
>> id. Then I call the update handler with .../handler/username?param=x
>>
>> Marcus
>>
>