Thanks, your answer was good enough. About the statement "I do not expect and I would not want objects that are not stored in database to expose the same API as if they were.", well, sometimes you might want to do that. For example, what if some of your models are just proxies for their mirror remote persistent classes that are exposed via a set of web services. Or your data store may be a remote store (like Amazon's S3) and needn't to be a relational database at all. Of course you then need to override ORM implementation of these APIs but still you should be able to this in a way that is seamless to your controller.
On Feb 19, 4:57 pm, mdipierro <[email protected]> wrote: > Yes and no. > > Not sure how EJB3 works so I cannot answer yes and no. I can tell you > what you can do. > > 1) you can define classes > > class MyObj: > def say_three(self): return 3 > > 2) you can make instances of the class persistent in various ways by > storing in cache > > myobj=cache.ram('myobj',lambda: MyObj(),timeout) > > 3) you can make instanced persistant for each session > > if not session.myobj: session.myobj=MyObj() > > 4) You can make in memory databases > > db=SQBD('sqlite:memory:') > db.define_table('table_in_ram',SQLField('fieldname')) > > and you can import/export the data. > > import cStringIO > file=cStringIO.String() > db.table_in_ram.export_to_csv_file(file) > file.seek(0) > db.table_in_ram.truncate() > db.table_in_ram.import_form_csv_file(file) > > Not sure how this compares with what you have in mind. > > I do not expect and I would not want objects that are not stored in > database to expose the same API as if they were. > > If you can give me a more explicit example perhaps I can give a > better answer. > > Massimo > > On Feb 19, 2:50 pm, luckyboy <[email protected]> wrote: > > > Does web2py support non-persistent model classes ? ie, a core model > > class where some business logic can be performed while that class > > doesn't necessarily (directly) map to a database table ? > > For example the model data can be retrieved from a remote web service, > > or a set of remote queries ? > > In all other MVC frameworks this is possible: In EJB3.0, unless you > > declare model as @entity it is not persistent. In RAILS, you can > > simply not inherit from ActiveRecord, and you may need to implement > > some methods like find, etc.. , or you can use a plugin like > > ActiveModel. Is this doable in web2py? My first guess is no. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py Web Framework" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
