On Mon, Jan 22, 2001 at 07:50:45PM +0100, Dieter Maurer wrote:
Michael Schmidt writes:
Can you create fields in a zope based database where you force
the fields to accept e.g. only letters "M" or "W" or any other
other combination of your choice?
What do you mean with a Zope based database?
If you mean an external database, look for the datatypes and
restrictions, they support for column values. SQL 3 may
give you some of what you want.
The wording of "Zope based database" may cause a misunderstanding,
what I really meant was a database behind Zope or a database
accessed through the interface of Zope.
Whether internal or external, you can control what goes through
Zope to your database. You will probably need External Methods to
get the full Python power, see "python.org" for documentation
about Pythons vast library.
You will be especially interested in the "re" module.
It implements (Perl style) regular expressions.
Do these also achieve error handling?
Shall say which part of the software presents error messages
on the screen if e.g. the user inputs other values than "M"
and "W" in the above question?
Please excuse my ignorance, I'm new to Zope. Why I'm asking is
that I'm thinking of recoding an application which I wrote years
ago in the 4GL ZIM of Zanthe Information Technologies. That ZIM
provided you with features I mentioned in the beginning and you
hadn't to handle the error handling of wrong/unwanted input
yourself, the underlying software did it for you.
Would be fine if Zope could do the same or similar, can it?
--
Michael Schmidt [EMAIL PROTECTED]
MIRROR OF
Ghostscript * X-Windows X11 * DJGPP * and more...
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