-------------- Original message ----------------------
From: johnf <[EMAIL PROTECTED]>
> On Monday 24 December 2007 10:41:01 am Adrian Klaver wrote:
> > On Monday 24 December 2007 10:18 am, Ed Leafe wrote:
> > > On Dec 24, 2007, at 1:04 PM, Adrian Klaver wrote:
> > > > Its not a problem with understanding the client-server model. I am
> > > > also
> > > > learning to use the python ORM Storm (https://
> > > > storm.canonical.com/), which by
> > > > the way is the first one I understand, after failed attempts at
> > > > SqlAlchemy
> > > > and SqlObjects. It is not three tier like Dabo, but does have a
> > > > similar
> > > > db-->obj layout. To help here is an obj class from Storm
> > >
> > > Be very careful in trying to match an ORM approach to the Dabo
> > > approach. They may have superficial similarities, but they are quite
> > > different in practice. Example: creating a new EmployeeBizobj doesn't
> > > create a new Employee record, but would do so in an ORM.
> > >
> > > -- Ed Leafe
> >
> > Yes and no. Storm uses the concept of data stores. So in the code I showed
> > the data store is sqlite_store=Store(sqlite). If I do :
> > sqlite_store.find(EmployeeBasic,employee_id=1)
> > I will get back an instance of EmployeeBasic where employee_id=1 should it
> > exist.
> > If I create an instance :
> > emp_2=EmployeeBasic('init_values')
> > then I get a new record, but at that point it only exists in memory. In
> > order to change the data store I have to:
> > sqlite_store.add(emp_2)
> > sqlite_store.commit()
> > At least from my point of view not all that different.
>
> I see your point but the difference is important. You have to issue a new()
> in Dabo to create the record otherwise all you have is a description of a
> record (plus other stuff) when you created the instance. I realize that
> sounds like minor thing because in the end results are the same. There are
> other things you can do with an instance of a bizObject beyond the new().
>
> --
Given my rather basic understanding of object oriented programming I can't
make a
compelling argument to the contrary. All I know is that having used both Dabo
and Storm
I see more similarities than differences. I used the Storm example mainly to
illustrate the
data source naming. Thanks though for sketching out the instance differences.
--
Adrian Klaver
[EMAIL PROTECTED]
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