object-persistence

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object-database: Changing the class hierarchy

I am reading me into object oriented databases right know and have to make a little presentation. Something I don\'t get and nowhere can find is following problem:[详细]

2023-04-09 09:57 分类：问答
What does a EClassNotFound raised at runtime really mean when the class in question is there at compile and link time, and there explicitly in code?

I have a runtime error happening in the rtl Streaming in of a form, causing an exception EClassNotFoundto be raised, while doing TReader.ReadRootComponent. The particular error message is \"Class not[详细]

2023-04-02 16:45 分类：问答
Issue with persisting specific relation with Doctrine2 ODM

I am using Doctrine 2 MongoDB ODM, all working fine except 1 specific relation. What\'s obscure is that I have seemingly identical relations in the project and they all work just fine[详细]

2023-03-26 15:48 分类：问答
Do I ever need to explicitly flush GORM save calls in grails?

I have a strange situation which appears to indicate a GORM cacheing problem //begin with all book.status\'s as UNREAD[详细]

2023-03-11 20:33 分类：问答
Business Entity contains persistence functionality

Is there a name for the pattern in which business objects contain their own persistence mechanis开发者_如何学Pythonm?For example:[详细]

2023-02-28 04:35 分类：问答
MVC3 multi step form - How to persist model object

I have a multi step form which uses one model object and I need t开发者_运维知识库o persist it between the steps. The object gets saved to the database only after the final step. I have seen people su[详细]

2023-02-15 02:16 分类：问答
Maintaining Android Activity's data: onPause, onSaveInstanceState, onRetainNonConfigurationInstance

I have an application Activity that in onCreate loads an XML file from a service using an AsyncTask. The XML is 开发者_如何学Pythonparsed into an ArrayList. When I switch to a different activity and t[详细]

2023-02-13 17:55 分类：问答
In JDO (AppEngine), after persisting an object, how can i get the key of that particular object?

When I persist an object to the datastore, when (and how) can I get the key of that particular object that I just persisted? So for example, if I have:[详细]

2023-02-13 14:04 分类：问答
Storing context object in Request object, is it disposed of?

I am writing a MVC3 application, using NInject DI and repository pattern. Ninject is set up so that the repositories have a per-request lifetime.[详细]

2023-02-13 01:26 分类：问答
nHibernate Exception: Unable to cast object of type

I am running into an nHibernate error while saving an object. The classes involved are: interface IHardwareSpecification[详细]

2023-02-08 09:32 分类：问答