Check out this set of Javadocs:
http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/datastore/KeyFactory.Builder.html
Key yourKey = KeyFactory.stringToKey("yourStringHere");
On Thu, Apr 8, 2010 at 3:26 AM, stsch77 wrote:
> I have tried to follow the documentation at
>
>
> http://code.google.com/intl/de-DE/appengine/docs/java/datastore/creatinggettinganddeletingdata.html
>
> but no matter what I try, I always get an error/an exception of
> different kinds.
>
> Already the simplest attempt comes up with an error. That's what i
> have:
>
> - - - - -
>
> public class Person {
>
>@Id
>private String id;
>
> - - - - -
>
> ...
> person.setId("stsch");
> <<>>.persist(person);
> ...
>
> - - - - -
>
> ==>
>
> java.lang.IllegalArgumentException: Cannot parse: stsch===
>at
> com.google.appengine.api.datastore.KeyFactory.stringToKey(KeyFactory.java:
> 192)
>at
>
> org.datanucleus.store.appengine.DatastoreRelationFieldManager.checkForParentSwitch(DatastoreRelationFieldManager.java:
> 201)
>at
>
> org.datanucleus.store.appengine.DatastoreFKListStoreSpecialization.updateElementFk(DatastoreFKListStoreSpecialization.java:
> 94)
>at
>
> org.datanucleus.store.mapped.scostore.FKListStore.updateElementFk(FKListStore.java:
> 254)
> ...
> Caused by:
>
> com.google.appengine.repackaged.com.google.common.util.Base64DecoderException:
> invalid padding byte '=' at byte offset 5
>at
>
> com.google.appengine.repackaged.com.google.common.util.Base64.decode(Base64.java:
> 529)
>at
>
> com.google.appengine.repackaged.com.google.common.util.Base64.decodeWebSafe(Base64.java:
> 493)
>at
> com.google.appengine.api.datastore.KeyFactory.stringToKey(KeyFactory.java:
> 190)
>
>
> What is necessary to use a String as Primary Key?
>
> --
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>
--
Ikai Lan
Developer Programs Engineer, Google App Engine
http://googleappengine.blogspot.com | http://twitter.com/app_engine
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