Hi, Tinker Pang, I am a Chinese 2. 你可以看看这个：http://code.google.com/p/twig-persist/，是个类似 Objectify 的持久层框架。 还有一个简易 GAE 框架：http://code.google.com/p/latke/
On Wed, Nov 24, 2010 at 8:00 PM, Tinker Pang <[email protected]> wrote: > Hi Vaninho > > What is "Objectify"? > > I am a Chinese, and I search "Objectify" by google , I can't search > Chinese material. > The Chinese material about "Objectify" is very few. > And the English material, I read it, and still can't understand it. > > Could you tell me the simple explanation about "Objectify"? > Thanks for your reply. > > Best Regards > Tinker > > > 2010/11/24 vaninh0 <[email protected]> > > Hi Tinker, >> >> It´s just a suggestion, use the Objectify. >> I've changed my project and the things are really better now! >> >> On 23 nov, 03:15, Tinker Pang <[email protected]> wrote: >> > Hi didier >> > >> > I have the same question, too >> > >> > When I creat the parent Key >> > >> > How can I get the parent via Key? >> > >> > I tested many times and many ways, I can't get the parent, >> > >> > And why use Key to build entity relation? Could I use other type? for >> > example int long string? >> > >> > Best Regards >> > Tinker >> > >> > 2010/11/23 Didier Durand <[email protected]> >> > >> > > Hi Vaninho, >> > >> > > If you want to group some A, B & C entities in the same entity group, >> > > you have to say (for example) that A is a parent of B (via a @Parent >> > > Key<A> key in B) and then that B is a parent of C (via a @Parent >> > > Key<B> in C). >> > >> > > You can add @Transient if you don't want the Keys to be stored as >> > > properties of the entity >> > >> > > Then you can query with ancestor() filter. >> > >> > > regards >> > > didier >> > >> > > On Nov 22, 9:10 pm, Jeff Schnitzer <[email protected]> wrote: >> > > > This doesn't make any sense; entities in the GAE datastore cannot >> have >> > > > multiple *parent* keys. However, your structure would work fine if >> > > > you just dropped the @Parent annotation. >> > >> > > > This may help: >> > >http://code.google.com/p/objectify-appengine/wiki/Concepts#Keys >> > >> > > > Jeff >> > >> > > > On Mon, Nov 22, 2010 at 10:22 AM, vaninh0 <[email protected]> >> wrote: >> > > > > Hi Didier, >> > >> > > > > with Objectify is possible to create a Entity with two distinct >> > > > > childrens? >> > >> > > > > example: >> > >> > > > > class A { >> > > > > @Id Long Id; >> > > > > } >> > > > > class B { >> > > > > @Id Long Id; >> > > > > } >> > > > > class C { >> > > > > @Id Long Id; >> > > > > @Parent Key<A> a; >> > > > > @Parent Key<B> b; >> > > > > } >> > >> > > > > regards, >> > > > > vanio. >> > >> > > > > On 20 nov, 14:41, Didier Durand <[email protected]> wrote: >> > > > >> Hi, >> > >> > > > >> I would recommend Objectify (which I use heavily): seems to match >> your >> > > > >> need. >> > >> > > > >> regards >> > > > >> didier >> > >> > > > >> On Nov 20, 1:20 pm, Roberto Saccon <[email protected]> wrote: >> > >> > > > >> > maybe a good place to start is sourcecode of lowlevel-based >> > > frameworks >> > > > >> > like slim3 or objectify >> > > > >> > -- >> > > > >> > Roberto >> > >> > > > >> > On Nov 20, 8:13 am, Tom <[email protected]> wrote: >> > >> > > > >> > > Hi there, >> > >> > > > >> > > I'm searching for information of entity relation ships in >> > > appengine. >> > > > >> > > JPA for example supports relations between entites >> (one-to-one, >> > > > >> > > ont-to-many, many-to-many). As far as I know by know the >> > > underlying >> > > > >> > > datastore doesn't direktly support this and not join queries >> > > (different >> > > > >> > > entities). >> > >> > > > >> > > How do you store Customer -> Orders in the datastore? Is >> there low >> > > > >> > > level API example code? >> > > > >> > > Would I store an entity "Customer" with attributes and a list >> of >> > > order >> > > > >> > > ids? >> > >> > > > >> > > Any help highly appreciated. >> > > > >> > > Thanks >> > > > >> > > Tom >> > >> > > > > -- >> > > > > You received this message because you are subscribed to the Google >> > > Groups "Google App Engine for Java" group. >> > > > > To post to this group, send email to >> > > [email protected]. >> > > > > To unsubscribe from this group, send email to >> > > [email protected]<google-appengine-java%[email protected]> >> <google-appengine-java%[email protected]<google-appengine-java%[email protected]> >> > >> > > . >> > > > > For more options, visit this group athttp:// >> > > groups.google.com/group/google-appengine-java?hl=en. >> > >> > > -- >> > > You received this message because you are subscribed to the Google >> Groups >> > > "Google App Engine for Java" group. >> > > To post to this group, send email to >> > > [email protected]. >> > > To unsubscribe from this group, send email to >> > > [email protected]<google-appengine-java%[email protected]> >> <google-appengine-java%[email protected]<google-appengine-java%[email protected]> >> > >> > > . >> > > For more options, visit this group at >> > >http://groups.google.com/group/google-appengine-java?hl=en. >> > >> > >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine for Java" group. >> To post to this group, send email to >> [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<google-appengine-java%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/google-appengine-java?hl=en. >> >> > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-appengine-java%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > -- My Blog: http://blog.csdn.net/DL88250 -------------------------------------------------------- Open Source, Open Mind, Open Sight, Open Future! -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. 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