I get a key like 'agZvd296em9yDgsSB2NvdW50cnkYzQEM' 2009/11/16 Bassil Karam <[email protected]>
> Rainer, > > What do you get for GoogleKey when you do 'GoogleKey = > GoogleWrite (myObj,myKind)'? > > Baz > > > On Mon, Nov 16, 2009 at 1:13 PM, Rainer <[email protected]> wrote: > >> >> 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 !! -~----------~----~----~----~------~----~------~--~---
