I have a model which contains a java.util.Set object as a 开发者_开发百科member. How do I persist this using JDO? Specifically, how do I define the XML in the .jdo file?
whats the most simple way to create a new entity in google app engine? i used now a simple servlet form, but it is annoying to upload a project only because you want to create a new entity. i am using
I am using JDO on google app engine. Each \'Employee\' has a \'key\'. I have a set of keys and wanted to retrieve all Employees whose key belongs to this set.
I\'ve tried to f开发者_开发技巧ind any info on that subject; can\'t find anything. Strikes me as odd, since JDO sounds like the kind of thing smartphones should be very good at doing.
I\'m using the JDO an开发者_高级运维notation dependent=\"true\" to delete my owned child classes like this:
Does a persistence manager generally need to be closed? Can you just keep one open and re-use it all the time, ie just repeat this pattern:
This further to my previous question on handling large numbers of objects in BigTables/JDO. Assuming a TransactionAccount could end up with as many as 10,000 objects in its transactions list, how doe
I am getting this error while trying to save something to Datastore. I have tried to search but not getting anything.
I need to take an object out of an EntityGroup and store it outside of an entity group, I think the simplest way to explain it is to show the code. In the following code, will the removeMessage() func
I am just learning JDO and GAE, and have gotten myself very stuck on this. I have gone from having just
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