jdo

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Google App Engine - JDODetachedFieldAccessException

I\'m pretty new to JPA/JDO and the whole objectdb world. I have an entity with a set of strings, looks a bit like:[详细]

2023-03-28 05:20 分类：问答
The class "The class "com.google.appengine.api.datastore.Key" is not persistable

I am trying to delete multiple entities given a List of Keys, I.e.: List keys = obj.getKeys(); pm.deletePersistentAll(keys);[详细]

2023-03-28 05:00 分类：问答
If my model class imports HttpServletRequest, Datanucleus enhancer throws NoClassDefFoundError

Is there a Datanucleus setting to prevent the enhancer throwing an error if the HttpServletRequest class is imported by the model class that is being enhanced?[详细]

2023-03-28 02:22 分类：问答
How do I query a single field in AppEngine using JDO

I\'ve got a Product POJO that looks like. @PersistenceCapable(identityType = IdentityType.APPLICATION)[详细]

2023-03-27 12:02 分类：问答
JDO with Java EE 6 (CDI and JTA?)

I apologize if this is an obvious question, but I\'m going through the Java EE 6 tutorial while reading a couple books and it\'s getting hard to correlate all of the information.[详细]

2023-03-26 06:31 分类：问答
Google App Engine large IN clause query

I have an Account entity that has a facebook id. Sometimes, the client might send all facebook ids (the clients facebook friends) to the server.[详细]

2023-03-26 05:04 分类：问答
Appengine JDO, how can I retrieve a child object knowing a child property and the parent key?

Using the peristance manager, how can I retrieve a child object knowing a child property and the parent key?[详细]

2023-03-26 04:40 分类：问答
Disable auto scanning for JDO classes datanucleus exploded war

When I deploy an开发者_运维技巧 exploded war file datanucleus fails with following error Caused by: org.datanucleus.exceptions.ClassNotResolvedException: Class \"JDOTutorial.war.WEB-INF.classes.com[详细]

2023-03-23 11:37 分类：问答
How to change parent of an object in JDO?

I am using JDO and google app engine. I have User class which has an arrayList of area objects. Every area object has an arrayList of Location objects which tells about coordinates. Now i want to move[详细]

2023-03-22 09:56 分类：问答
How to map collections to mongodb using datanucleus/jdo?

I\'m trying to map an existing mongodb database to domain objects using datanuclues (3.0.0-m6) / JDO.[详细]

2023-03-22 05:07 分类：问答