I\'m using Google Web Toolkit with java and google datastore as database. The entity class has arraylist and on trying to retrieve the data from data base I\'m ge开发者_运维百科tting the exception:
In a Python Google App Engine app I\'m writing, I have an entity stored in the datastore that I need to retrieve, make an exact copy of it (with the exception of the key), and then put this entity bac
I have a simple data model that includes USERS:store basic information (key, name, phone # etc) RELATIONS:describe, e.g. a friendship between two users (supplying a relationship_type + two user keys
And if not, why not? The following index always fails to build on the production server, even though I had thought I could have a sort order with a list property as long as the index didn\'t sort or
I am using Polymorphic Models. Simple Question: My code below works without using this line below, which I see in other people\'s code. What is it supposed to do?
Coming from a relational database background, as I\'m sure many others are, I\'m looking for some solid guidelines for setting up / designing my datastore on Google App Engine.Are there any good rules
I need to store some data that looks a little like this: xyz 123 abc 456 hij 678 rer 838 Now I would just store it as a traditional string and integer model, and put in the datastore. But the data
I want to make client version of GAE app that store exact data of online version.(myapp.appspot.com) If i can use 开发者_开发问答sdk instead, is any library or tools to sync online and sdk version? I
I think I\'m overlooking something simple here, I can\'t imagine this is impossible to do. I want to filter by a datetime attribute and then order the result by a ranking integer attribute.When I try
I\'m hitting what appears (to me) strange behavior when I pull data from the google datastore over JDO.In particular, the query executes quickly (say 100 ms), but finding the size of the resulting Lis
加载中,请稍侯......