[Zope] Optional date properties (Zope 1.11)

[Michel Pelletier]

> -----Original Message-----
> From: Alexander Staubo [mailto:alex@mop.no]
> Sent: Thursday, June 10, 1999 11:02 AM
> To: Zope Mailing List (E-mail)
> Subject: RE: [Zope] Optional date properties (Zope 1.11)
> 
> 
> Okay, admittedly that is so -- but I'd still like to pass a default
> value. Most date/time systems have a way of specifying a "zero" date
> value that be tested for equality. Right now what I'm doing is testing
> against "1900/01/01 00:00:00.0000 GMT+1", which feels a little stupid.
> 

I beleive DateTime(0) (or ZopeTime(0)) gives you an effective 'lower
bound'.

-Michel


> --
> Alexander Staubo             http://www.mop.no/~alex/
> "`Ford, you're turning into a penguin. Stop it.'"
> --Douglas Adams, _The Hitchhiker's Guide to the Galaxy_
> 
> >-----Original Message-----
> >From: Brian Lloyd [mailto:Brian@digicool.com]
> >Sent: 10. juni 1999 16:56
> >To: 'Alexander Staubo'; Zope Mailing List (E-mail)
> >Subject: RE: [Zope] Optional date properties (Zope 1.11)
> >
> >
> >> I thought I could add an optional date property to my Z
> >> Class' property
> >> sheet, but no -- it seems Zope requires that you fill in a
> >valid date.
> >> Is there a workaround?
> >>
> >> Isn't this inconsistent with other properties' behaviour, though?
> >> Wouldn't it be logical that an empty date value as entered 
> in Zope's
> >> management screens would represent "None" or at least a
> >generic "zero"
> >> date?
> >>
> >> --
> >> Alexander Staubo
> >
> >I don't think that this is necessarily inconsistent - for example,
> >if you try to add an int, float, etc. with no value you get:
> >
> >exceptions.ValueError:
> >Empty entry when integer expected
> >
> >String and string-ish fields may _seem_ to act slightly
> >differently in that they accept an empty value, but this
> >is really not so different when you consider that '' is a
> >valid string (in the same way that 0 would be a valid,
> >but "empty" integer).
> >
> >
> >Brian Lloyd        brian@digicool.com
> >Software Engineer  540.371.6909
> >Digital Creations  http://www.digicool.com
> >>
> >
> 
> 
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