I\'m using google app engine and its datastore to store a JDO Entity, called A.Class A has a @Persistent member of type B.I\'m making changes to A, everything works fine... except this B member is nev
I\'m trying to write to a JDO store using this code: PersistenceManager pm = PMF.get().getPersistenceManager();
Do not close this as a duplicate of other questions because I\'m not asking the same thing. They\'re also about a year old. That said, see these links:
App Engine Datastore cannot be queried for an aggregate result. Example: I have an entity called \"Post\" with the following fields:
I\'m using eclipse and google appengine plugin to develop a war app. I\'m trying to use JDO persistency (per appengine rules). I\'d like to be able to inspect, add and remov开发者_运维技巧e jdo object
I cant imagine any more methods to solve my problem.Here\'sa thread I made yesterday that describes the parent and child class in detail:https://stackoverflow.com/questions/3800450/many-to-one-unidire
I have a simple app I\'d like to use JDO. But I don\'t want to use any DB back, just regular file system. Before jdo, I had this class it serializes it object to a file whereas file name is the \"prim
This syntax does not produce unique values across different Fetch Groups: @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
I\'m trying to construct a JDOQL query (using datanucleus) that will search for m开发者_Python百科atches of a parent class based on criteria in an owned one-to-many child class.The query looks like th
I am getting below error whilst trying to persist an object that has a collection of interfaces which I want to hold a couple of different types of objects. Seems to be happening almost randomly. Some
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