I have been working assiduously on a GWT project. I have implemented the stockwatcher app without problems. It's new to me to be working with JDO/JPA. I'm more in tuned to using relational DB. There are no concrete application example that deals with one to many DB. I have read some of the documentation to create and use a one to many DB. I have been able to save the one to many data, but I'm unable to retrieve the data. I don't fully understand it all. Google should recognize that many people learn by doing. There needs to be a sample application with one to many relationships (and many to many).
If Google's only tutorial on GWT was like what is shown here http://code.google.com/appengine/docs/java/datastore/relationships.html. Then less people would have used it. I know I'll learn how to implement one to many properly by 'googling' the Internet. However, it could have been less painful! Please post a sample application
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