That is very clear, thanks Casey.
On Tue, Apr 6, 2010 at 6:20 PM, Casey Duncan <ca...@pandora.com> wrote:
> The only requirement for an object to be stored in zodb is that it is
> pickeable. However, if an object is mutable (as most user-defined objects
> are) its class should subclass Persistent so that updates to it are
> automatically saved and it will get put as its own "record" in the database.
> Practically-speaking, all user-defined objects stored in zodb should
> subclass Persistent. Not doing so either implies that you really know what
> you are doing, or the opposite 8^).
> On Apr 6, 2010, at 5:54 PM, george hu wrote:
> > In the official documentation, the tutorial of zodb wiki shows a Page
> class who is inherited from the the Persistent. When I look at the Feeds
> Tool example on Karl, none of the model classes are inherited from the
> Persistent, but the objects are saved into the zodb. So I would like to know
> the details of inheriting from the Persistent, or the consequence of not
> > Thanks
> > George Hu
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