Good point Baz: At the moment I use GoogleWrite(MyObj,getMetaData (MyObj).name,'MyKey123'). Why must I give the name of my object as an argument, when the function GoogleWrite should be able to fetch it itselve from the first argument MyObj?
I furthermore must recall my latest blog here: keyName NOT EQUALS googleKey!!! I still think that the implementation of the unique keys of objects in the datastore is confusing! First of all, you can NOT use the 'GoogleKey' which is generated by the function 'GoogleWrite'. If you try 'GoogleKey = GoogleWrite (myObj,myKind)' and in a next request you use the GoogleKey to do an update like 'GoogleKey2 = GoogleWrite(myObj,myKind,GoogleKey)', there will be 2 objects in the datastore, and 'GoogleKey2' NOT equals 'GoogleKey'! Secondly, if you generate a unique key yourselve (f.i. myUniqueKey = CreateUUID()), you must store this unique key as a property in your object in order to be able to update this object in the datastore. Let me explain: I save a new object to the datastore with 'GoogleWrite (myObj,myKind,myUniqueKey)'. In a next request, I must read myUniqueKey from a (listed) object, in order to be able to update the object in the datastore by doing a 'GoogleWrite (myObj,myKind,myUniqueKey)'. I think that's really stupid, if there's already a GoogleKey! And now I am back at my first point, that you can NOT use the GoogleKey! So, what I am trying to say is that the idea of having a GoogleKey is really great, because you would not have to store a unique key in your object. But that only works if you can first do a GoogleKey = GoogleWrite(myObj) and than later on use this GoogleKey to do a GoogleWrite(myObj,GoogleKey), and NOT GoogleWrite(myObj,keyName)!! Vince, could you please respond to this post and let me know what you think, I would really appreciate that. Cheers, Rainer. On Nov 16, 8:55 pm, Bassil Karam <[email protected]> wrote: > My pleasure :) > > One suggestion I would make to Vince is to reverse the positions of the > attributes "kind" and "keyName" and to not make "kind" required if "keyName" > is specified. For example, if I wanted to save an object, I could do: > > googleWrite(MyObj); > > This will automatically populate the kind and the keyName, but if I had my > own key name, it seems I should be able to simply provide it: > > googleWrite(MyObj, 'MyKeyName'); > > With the "kind" automatically populated as before. Why should I have to now > specify it just because I have a key? > > Similarly if you invoke googleWrite on the component itself: > > MyObj.googleWrite('MyKeyName') > > I think keyname is going to be specified MUCH more often than kind and > should therefore precede kind in the attribute list and also not be tied to > it. > > Just some thoughts, > Baz > > On Mon, Nov 16, 2009 at 11:17 AM, Rainer <[email protected]> wrote: > > > Thanks Baz, that one helped me out. > > > I didn't get it into my grey cells that keyName = googleKey. Of > > course, it's not a problem to use a kind, but I didn't know that you > > can use a GoogleKey as a KeyName to update an object with GoogleWrite. > > > Great, let's put my model together this night! > > > Thanks again Baz. > > > Rainer. > > > On Nov 16, 6:25 pm, Bassil Karam <[email protected]> wrote: > > > Rainer, > > > > For your first question you say that you have the google key in a hidden > > > form field. So that means you can do: > > > > googleWrite(MyCFC, 'MyKind', 'MyKey123'); > > > > What's the trouble? Is it that you would prefer to do something like: > > > > MyCFC.setGoogleKey('MyKey123'); > > > MyCFC.googleWrite(); > > > > So that you don't have to specify a kind? > > > > Baz > > > > On Mon, Nov 16, 2009 at 1:27 AM, Rainer <[email protected]> > > wrote: > > > > > Sorry for my mistake... > > > > In my option 2) I know, that I can update an object with GoogleWrite > > > > (kind,keyName), so that's not my question there. > > > > My question in option 2) is: > > > > How do I get the kind and Keyname when I do a listing? > > > > - aUsers = GoogleQuery('select from User'); > > > > - loop over aUsers > > > > - have an User object, can I do than a User.getKind() and > > > > User.getKeyName()? > > > > > Rainer. > > > > > On 16 nov, 10:18, 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 athttp:// > > > > 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. > > > > > > On 14 nov, 10:52, Rainer <[email protected]> wrote: > > > > > > > Great! ... but, how do I know when I try to insert a new object > > what > > > > > > the new int (max int + 1) is for this specific object's keyName? > > > > > > > And if I start using a UUID, is it unique enough to be sure it was > > not > > > > > > used before in a save action to the datastore? > > > > > > > Questions... questions... > > > > > > > Rainer. > > > > > > > On Nov 14, 2:01 am, Bassil Karam <[email protected]> wrote: > > > > > > > > I think I read somewhere that an int works a lot faster on gae, > > but I > > > > could > > > > > > > be completely mistaken. Anyone know? But otherwise, yeah: ) > > > > > > > > On Nov 13, 2009 4:54 PM, "Rainer" <[email protected]> > > wrote: > > > > > > > > Okay, so I don't rely on googleKey, but instead, I create my own > > > > > > > unique key, like maybe a UUID ?! > > > > > > > > On Nov 14, 1:43 am, Bassil Karam <[email protected]> wrote: > > > Hey > > > > Rainer, > > > > > > > you don't need to read f... > > > > > > > > > On Fri, Nov 13, 2009 at 4:14 PM, Rainer < > > [email protected]> > > > > wrote: > > > > > > > > > > Guys, > > > Maybe ...- Tekst uit oorspronkelijk bericht > > niet > > > > weergeven - > > > > > > > - Tekst uit oorspronkelijk bericht weergeven -- Tekst uit > > > > oorspronkelijk bericht niet weergeven - > > > > > > - Tekst uit oorspronkelijk bericht weergeven - > > --~--~---------~--~----~------------~-------~--~----~ Open BlueDragon Public Mailing List http://www.openbluedragon.org/ http://twitter.com/OpenBlueDragon mailing list - http://groups.google.com/group/openbd?hl=en !! save a network - please trim replies before posting !! -~----------~----~----~----~------~----~------~--~---
