Retrieving the ID of a newly stored item
I am using Restlet to be able to handle the data the same way in a GWT+Android+App engine project. On the app engine side of things I am using Objectify to store the instances in the datastore, which works like a charm, however I can't seem to figure out how to retrieve the ID of the created instances of my data. For instance on android, I create a new instance of the type Person, and set the name and surname, the Person class also has an ID, which will get auto generated by Objectify/Datastore once created on the serverside. But how do I aquire the object _after_ I store it on the server? For instance my android code to store the object looks like this: // Initialize the resource proxy. ClientResource cr = new ClientResource(url); PersonResource resource = cr.wrap(PersonResource.class); Person p = new Person(Firstname, LastName); resource.store(p); Which results in the server saving the resource in the database, and generating an ID for it aswell. I can of course fetch the object again using retrieve, but since the ID is not accessible this won't work. I gather returning the object somehow is the way to go, but what is the best practise here? Regards David -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2519696
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Oops, I'm mistakenly approved this message. Thierry Boileau -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2519716
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Oops, I've mistakenly approved this message. Thierry Boileau -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2519717
RE: Retrieving the ID of a newly stored item
Well, nevermind that, I just solved it by simply returning the object :). (Guess forgetting to deploy to app engine the changes you make is a dumb thing to forget) -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2519774
RE: Retrieving the ID of a newly stored item
The GWT client however does not like being returned anything it seems, when I try to return the Object in question I get a GWT compilation error: [INFO] Compiling module se.frojd.android.Person.Person [INFO]Scanning for additional dependencies: file:/C:/Users/David/Documents/Projects-eclipse/Person/Person-gwt/src/main/java/se/frojd/android/Person/client/PersonApp.java [INFO] Adding '7' new generated units [INFO] Validating newly compiled units [INFO] [ERROR] Errors in 'generated://F3E3A777AF3AC3C8A8B893828F4B6A2E/se/frojd/android/Person/client/PersonResourceProxyProxy.java' [INFO][ERROR] Line 43: The return type is incompatible with PersonResourceProxy.store(Person, ResultVoid) [INFO]See snapshot: C:\Users\David\AppData\Local\Temp\PersonResourceProxyProxy2014780417928581067.java [INFO] [ERROR] Unable to find recently-generated type 'se.frojd.android.Person.client.PersonResourceProxyProxy [INFO][ERROR] Errors in 'file:/C:/Users/David/Documents/Projects-eclipse/Person/Person-gwt/src/main/java/se/frojd/android/Person/client/PersonApp.java' Is this a known issue? -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2519791
RE: Retrieving the ID of a newly stored item
Hello David, I think you should update the method of the proxy: from PersonResourceProxy.store(Person, ResultVoid) to PersonResourceProxy.store(Person, ResultPerson) As it returns a Person object, now. Best regards, Thierry Boileau -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2519818
RE: Retrieving the ID of a newly stored item
Ah yes, but now I get this instead: [INFO] Validating newly compiled units [INFO] [ERROR] Errors in 'generated://F3E3A777AF3AC3C8A8B893828F4B6A2E/se/frojd/android/Person/client/PersonResourceProxyProxy.java' [INFO][ERROR] Line 18: The type PersonResourceProxyProxy must implement the inherited abstract method PersonResourceProxy.store(Person, ResultPerson) [INFO][ERROR] Line 43: Name clash: The method store(Person, ResultVoid) of type PersonResourceProxyProxy has the same erasure as store(Person, ResultPerson) of type PersonResourceProxy but does not override it [INFO]See snapshot: C:\Users\David\AppData\Local\Temp\PersonResourceProxyProxy4587954101559631058.java [INFO] [ERROR] Unable to find recently-generated type 'se.frojd.android.Person.client.PersonResourceProxyProxy [INFO][ERROR] Errors in 'file:/C:/Users/David/Documents/Projects-eclipse/Person/Person-gwt/src/main/java/se/frojd/android/Person/client/PersonApp.java' [INFO] [ERROR] Internal compiler error Which happens if i use _any_ return type (I tried String, Long and a mockup-class aswell). GWT compiler does not seem to like this return? -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2519841
RE: Retrieving the ID of a newly stored item
Hi David, you can also return the location of the created resource in the response: Representation#setLocationRef. Best regards, Thierry Boileau -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2519843
RE: Retrieving the ID of a newly stored item
Hi David, at a first glance, I would that the compiler is just lost. Could you clean your project, maybe quit Eclipse and restart? Best regards, Thierry Boileau -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2519919
RE: Re: Internal Connector Error (1002) [GWT 2.0, restlet-gwt-2.0rc2]
Hello, such 405 error happens when the target resource does not implement the request's method. Is your resource designed to answer to GET requests? What happens if you send a PUT request? Best regards, Thierry Boileau -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2522873
RE: Re: How to write an Universal redirector
Hi, I've entered a new RFE for this point : http://restlet.tigris.org/issues/show_bug.cgi?id=1077 This is due to the request generated by the redirector. Best regards, Thierry Boileau -- http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447dsMessageId=2523593
