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Subject: Re: couchdb.http.ResourceConflict: ('conflict', 'Document update conflict.')
From: handloomweaver <a.w.macmil...@gmail.com>
To: CouchDB-Python <couchdb-python@googlegroups.com>
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That was really helpful and did indeed work. Now I want to save to
couchdb fields that contain multiple values that are appended over
time. So in the same vein. How would I save to a ListField to append
to the list and not overwrite what's there?


On Oct 13, 8:23=A0pm, Matt Goodall <matt.good...@gmail.com> wrote:
> On 13 October 2010 17:58, handloomweaver <a.w.macmil...@gmail.com> wrote:
>
> > Hi
>
> > Now that works but it seems to create a new document and not update
> > the existing? Is that wrong or is that how couchdb works?
>
> If you use the same _id it should not create a new document. For
> instance, using a new, blank database:
>
> >>> len(list(db.view('_all_docs')))
> 0
> >>> db.save({'_id': 'me', 'name': 'Matt'})
>
> ('me', '1-47804390369d435cb116403da935bdd5')>>> len(list(db.view('_all_do=
cs')))
> 1
> >>> me =3D db.get('me')
> >>> me
>
> <Document 'me'@'1-47804390369d435cb116403da935bdd5' {'name': 'Matt'}>>>> =
me['name'] =3D 'Matt Goodall'
> >>> db.save(me)
>
> ('me', '2-8b7344ea179d5b721ce4546e1a4566a9')>>> len(list(db.view('_all_do=
cs')))
>
> 1
>
> Are you sure you're using the same _id? If you are sure, please could
> you post a short example that creates two documents.
>
> - Matt
>
>
>
>
>
>
>
>
>
> > AL
> > On Oct 13, 5:36=A0pm, Matt Goodall <matt.good...@gmail.com> wrote:
> >> On 13 October 2010 17:23, handloomweaver <a.w.macmil...@gmail.com> wro=
te:
>
> >> > Hi
>
> >> > I would appreciate some advice. I'm trying to simply update an
> >> > existing document. I thought from reading the docs it was the same
> >> > process as creating a new document. I've made an email address my do=
c
> >> > id in this instance
>
> >> When you update an existing document you must include the document's
> >> current _rev. CouchDB checks the _rev is correct before updating the
> >> database.
>
> >> In practice, this means you must first get the document from the
> >> database before making changes and saving it. For example, to change a
> >> password you would do:
>
> >> =A0 doc =3D db.get('...@atomised.coop')
> >> =A0 doc['password'] =3D '35gst66s'
> >> =A0 db.save(doc)
>
> >> Hope that helps.
>
> >> - Matt
>
> >> > doc =3D {'_id' : '...@atomised.coop', =A0'password' : '35gst66s'}
> >> > db.save(doc)
>
> >> > Traceback (most recent call last):
> >> > =A0File "<stdin>", line 1, in <module>
> >> > =A0File "/home/almacmillan/lib/python2.6/CouchDB-0.8-py2.6.egg/couch=
db/
> >> > client.py", line 407, in save
> >> > =A0File "/home/almacmillan/lib/python2.6/CouchDB-0.8-py2.6.egg/couch=
db/
> >> > http.py", line 405, in put_json
> >> > =A0File "/home/almacmillan/lib/python2.6/CouchDB-0.8-py2.6.egg/couch=
db/
> >> > http.py", line 384, in put
> >> > =A0File "/home/almacmillan/lib/python2.6/CouchDB-0.8-py2.6.egg/couch=
db/
> >> > http.py", line 419, in _request
> >> > =A0File "/home/almacmillan/lib/python2.6/CouchDB-0.8-py2.6.egg/couch=
db/
> >> > http.py", line 306, in request
> >> > couchdb.http.ResourceConflict: ('conflict', 'Document update
> >> > conflict.')
>
> >> > Am I getting this wrong or is this a bug?
>
> >> > I am a beginner programmer so this may very well be so!
>
> >> > Any help really appreciated
>
> >> > Kind thanks
> >> > AL
>
> >> > --
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