Re: Few problems with creating/ updating entities with requestfactory and appengine

I'm don't know appengine, but if you want update something you must do in a transaction scope. See Jpa transactions

Juan

2011/3/31 Marcin Misiewicz <misqu23@gmail.com>

Hi Juan

1. I added @Basic annotation with fetch type eager and it works. Till now I was pretty sure that embedded object are always fetched and I thought that this problem is related to the appengine.  

2. Here is my persistence.xml file. Do you suggest that I should use transactions to get it working ? I'm using appengine for the first time and this app is actually testing app, I'm testing the  new api Editors, RF. That's why i don't know much about appengine and its datastore.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<persistence xmlns="http://java.sun.com/xml/ns/persistence"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.0"

xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">

<persistence-unit name="transactions-optional">

<provider>org.datanucleus.store.appengine.jpa.DatastorePersistenceProvider</provider>

<properties>

<property name="datanucleus.NontransactionalRead" value="true" />

<property name="datanucleus.NontransactionalWrite" value="true" />

<property name="datanucleus.ConnectionURL" value="appengine" />

</properties>

</persistence-unit>

</persistence>           

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