objectify Questions

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I am using appengine with Objectify to access my datasource. I use Spring for my business layer. In order to play with data I use the objectify-appengine-spring factory. I would like to use annota...

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Hi have two related Entities: Customers and Cars. Each Customer can own several Cars This is a summarized view of the entities: public class Customer { //Inner classes for partial loads public...
Diogenes asked 4/2, 2014 at 14:50

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Dummy question. I create my POJO Objectify entity (for example, "Category") and persist it. Then I retrieve it via a query. I want to use it in a one-to-may relationship e.g. want to set my cat...
Halden asked 23/8, 2011 at 13:56

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I'm using GAE 1.8.1 and I've hit an issue with Objectify with the new scattered ID system. At least I think it's Objectify, I'm not sure (Using Objectify 4 RC1). I'm getting this.. Caused by: java...
Bowerbird asked 13/6, 2013 at 20:29

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Inorder to make my application faster, I'm using the MemcacheService. Now, while I'm trying to put an object into the MemcacheService, I'm getting the following error: java.lang.IllegalArgumentExc...
Logarithm asked 19/4, 2013 at 14:7

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I have a m-n relationship with Objectify, and I want to get 1 side of the relation. I was trying to solve it with this query: Query query = ofy().load().type(Person.class); query.filter("positi...
Cass asked 25/3, 2013 at 18:7

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I am developing an application using GeoModel. I need to perform search in a particular radius based on the given latitude and longitude. I am able to generate the GeoCells in the datastore using O...
Anatole asked 8/3, 2013 at 11:22

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I can't find any documentation on the appropriate way to make a many-to-many relationship between objects using Objectify on Google App Engine. Can anyone explain how to do this? Do I need to crea...
Icefall asked 5/2, 2012 at 16:27

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I'm trying to save an object and verify that it is saved right after, and it doesn't seem to be working. Here is my object import com.googlecode.objectify.annotation.Entity; import com.googlecod...
Pfaff asked 1/2, 2013 at 17:42

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boolean r = ofy().transact(new Work<Boolean>() { @Override public Boolean run() { Visit visit = ofy().load().type(Visit.class) .filter(Visit.USER_ID, userID) .filter(Visit.VENUE_ID, ven...

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My servlet should perform the following : when a user registers at a venue, I check whether he's currently registered somewhere (even if it is the same venue) if so, unregister him and to register ...
Overcasting asked 22/12, 2012 at 4:44

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In the appengine Billing and Budgeting Resources page, it says that the cost of a "Query" maps to "1 read + 1 small per entity retrieved", whereas a "Query (keys only)" maps to "1 read + 1 small pe...
Hemp asked 12/8, 2012 at 15:59

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I want to show my users some statistics such as hits/second on Google App Engine. I started to roll my own: On each page view, add 1 to a count in memcache. Each minute: Read and reset the co...
Alvardo asked 2/8, 2012 at 12:58

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Possible Duplicate: When using lxml, can the XML be rendered without namespace attributes? How can I strip the python attributes from an lxml.objectify.ObjectifiedElement? Example: ...
Diapause asked 26/5, 2011 at 15:56

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for example my xml file contains : <layout name="layout1"> <grid> <row> <cell colSpan="1" name="cell1"/> </row> <row> <cell name="cell2" flow="horizont...
Immutable asked 4/7, 2012 at 8:35

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This is related to question Java Appengine APPSTATS causing java out of memory error. Appstats seems to cause a java.lang.OutOfMemoryError on 128MB instances and I wonder whether there are ways to...
Perverted asked 15/5, 2012 at 0:4

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I'm currently building an app for deployment to GAE, using Objectify 3.1. I am getting strange results when attempting to do a query with an order() clause. My domain: public class InvoiceLineIt...
Xanthene asked 7/5, 2012 at 17:46

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I have a GAE project written in Java and I have some thoughts about the HRD and a problem that I'm not sure how to solve. Basically I have users in my system. A user consists of a userid, a userna...
Retiary asked 5/4, 2012 at 13:14

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I'm fairly new to Objectify, and I had a quick question for the best way to do something: Lets say I have an application that allows people to send and receive messages (think e-mail for simplic...
Huddersfield asked 16/2, 2012 at 9:53

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I need to check whether a certain tag exists in an xml file. For example, I want to see if the tag exists in this snippet: <main> <elem1/> <elem2>Hi</elem2> <elem3/...
Kotz asked 22/3, 2011 at 1:40

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I have following entity (non-relevant fields/methods are removed). public class HitsStatsTotalDO { @Id transient private Long targetId; public Key<HitsStatsTotalDO> createKey() { retur...

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I am approaching to Gwt + Gae world. My essential need is to send over the Gwt-Rpc wire my Entity classes, without duplicating them into DTOs. Objectify promise to do that pretty well. It claims ...
Scutellation asked 20/7, 2011 at 21:10

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Is it possible to make an Objectify query with a list and get a list of all objects matching the list? For example List<String> vinNumberList; Query<CarObject> q=ofy.query(CarObject.cl...
Nance asked 5/11, 2011 at 0:16

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See the orignal question for context. Additional Context: Objectify-Appengine is used for persistence. FormProxy and QuestionProxy are of type EntityProxy QuestionDataProxy and its subtypes are...
Bidarka asked 17/8, 2011 at 15:38

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Can you find a good tutorial or documentation about achieving a good pagination in a Google App Engine Objectify world? I found some posts: http://groups.google.com/group/objectify-appengine...
Carpio asked 28/7, 2011 at 15:52

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