Using Google App Engine SDK and Python, I\'m facing an issue : I\'m unable to access the开发者_如何学Go ID property of a given entity properties. The only properties I can access are those defined in
Using JDO on GAE, I\'m using a simple database transaction code block like below. What is a good way to retry/recover from a thrown java.sql.SQLException: Concurre开发者_StackOverflow中文版nt Modific
I know what you\'re thinking, \'O not that again!\', but here we are since Google have not yet provided a simpler method.
If I found information about removing unused indexes, like in Uploading and Managing a Python App / Deleting Unused Indexes, it was only for the Python environment...
I开发者_JS百科s there a way to use a real database(SQLite, Mysql, or even some non-relational one) asdatastore for development, instead of memory/file datastore that is provided.
I have to add new fields to existing tables. After I add the fields , the application breaks as old records do not have newly added field and throw exception. Is there a way to update all old records
I have two models in relation one-to-many: class Question(db.Model): questionText = db.StringProperty(multiline=False)
Right, I don\'t know if I\'m barking entirely up the wrong tree here - I\'m finding JDO and开发者_StackOverflow社区 the Google AppEngine a bit tricky to get the hang of. Anyway, here goes.
In general, it\'s better to do a single query vs. many queries for a given object. Let\'s say I have a bunch of \'son\' objects each with a \'father\'. I get all the \'son\' objects:
The standard way of doing singletons in Python is开发者_JAVA百科 class Singleton(object): _instance = None
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