I am not able to get child entities to load once they are persisted on Google App Engine. I am certain that they are saving because I can see them in 开发者_运维技巧the datastore. For example if I hav
GAE recommends using JDO/JPA. But I have serious question about using OODB like them. JDO based on user\'s class structure. And d开发者_如何学Goata structure should be modified continually as service
I just need to change order of items in a (previously persisted) ordered collection... I tried simply passing the re-arranged collection to a setter: after committing a transaction the collection is
What exception does com.google.appengine.api.datastore.Transaction.commit() throw when there is a concurre开发者_如何学Goncy problem?
I\'m trying to implement paging in my GAE-J/GWT app.Paging forward with a cursor is straight-forward, but I\'m wondering if there\'s some best-p开发者_Python百科ractice for paging both forward and bac
Is it possible to query App Engine\'s Datastore from outside the cloud, i.e. a client application? I could possibly write an app to be housed within AppStore and query the Datastore returning XML-for
I\'m using the Google App Engine with Python (Django). How to emulate \"SELECT * FROM bla WHERE touser = common.userstats(\"key\") OR fromuser = common.userstats(\"key\") ORDER BY date ASC\"?
Has anyone got any example code for creating a unique number sequence to be used as keys for开发者_StackOverflow社区 an entity in a Google app engine datastore?
Google app engine has smart feature named back references and I usually iterate them where the traditional SQL\'s computed column need to be used.
I\'m trying to make my mind on whether to store a binary 开发者_如何转开发representation of an entity as its Blob property, or whether I better keep the blobs in some separate \'wrapping\' class.
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