1) You should do a read-update-write to update the User object (see my
previous message).
2) Again, I'd recommend doing a read-update-write to update the User
object. However, if you want to completely replace an existing User object
and you know the "kind" and "keyName", then you could create a new User
object and then do:
GoogleWrite( User, kind, keyName );
This would have the effect of completely overwriting any existing User
object with the same kind/keyName.
Vince
On Mon, Nov 16, 2009 at 4:18 AM, Rainer <[email protected]> wrote:
>
> Vince,
>
> Coul you please clarify me on this subject, I don't get 'the circle
> closed'.
>
> When I follow the documentation at
> http://wiki.openbluedragon.org/wiki/index.php/GoogleAppEngine:Datastore,
> I can't seem to make a closing structure of my logic.
>
> 1) When I choose to go for the googleKey (which I higly prefer,
> because it's generated by the datastore), I do the following:
> - create an object from my User.cfc (bean); User = CreateObject
> ('component','model.user.User').init()
> - write it to the datastore; googleKey = GoogleWrite(User);
> - read from the datastore; User = googleRead(googleKey);
> - get list of users; aUsers = GoogleQuery('select from User')
> But what if I have a the details of a user in a form (with the
> googleKey in a hidden input), and I post this form.
> How do I than create a User object that 'knows' the googleKey so that
> a GoogleWrite() will update an exisiting object in the datastore?
> Should I first do a 'User = googleRead(googleKey)' and than update the
> properties with my form properties, and than 'GoogleWrite(User)'?
> Or can I set the googleKey in my User object with a 'setGoogleKey()'
> function, or something like that?
>
> 2) When I choose to go for the combination kind/keyName, I do the
> following:
> - create an object from my User.cfc (bean); User = CreateObject
> ('component','model.user.User').init(kind,keyName)
> - write it to the datastore; GoogleWrite(User,kind,keyName);
> - read from the datastore; User = googleRead(kind,keyName);
> - get list of users; aUsers = GoogleQuery('select from User');
> But what if I have a the details of a user in a form (with the kind
> and keyName in a hidden input), and I post this form.
> How do I than create a User object that 'knows' the the kind and
> keyName so that a GoogleWrite() will update an exisiting object in the
> datastore? Should I first do a 'User = googleRead(kind,keyName)' and
> than update the properties with my form properties, and than
> 'GoogleWrite(User)'?
> Or can I set the kind and keyName in my User object with 'setGoogleKind
> () and setGoogleKeyName()' functions, or something like that?
>
> Maybe, I am overseeing something very badly, but after read the doc a
> couple of time, and trying some different code, I coul not come up
> with a solution.
>
> Thank you in advance for helping me out,
>
> Rainer.
>
>
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