Re: [Zope3-Users] Re: Referencing objects in auto-generated forms
Hi,. On Sun, Apr 16, 2006 at 01:48:37PM -0500, Jeff Rush wrote: [snip] Frank, I thought vocabularies were being de-emphasized though, in favor of the newer 'sources' component? Vocabularies were good for short lists of choices, but because it read them all into memory at once not so good at lazy evaluation. Sources supposedly uses an iterator and is good for both short and long lists, as I roughly understand it. Hmm - I've heard about Sources before but I didn't know the difference to vocabularies. Thank you for the hint. BTW: Does de-emphasized mean deprecated and no longer supported in Zope3.nnn ? Regards, Frank ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Re: Referencing objects in auto-generated forms
On Apr 18, 2006, at 3:31 AM, Frank Burkhardt wrote: Hi,. On Sun, Apr 16, 2006 at 01:48:37PM -0500, Jeff Rush wrote: [snip] Frank, I thought vocabularies were being de-emphasized though, in favor of the newer 'sources' component? Vocabularies were good for short lists of choices, but because it read them all into memory at once not so good at lazy evaluation. Sources supposedly uses an iterator and is good for both short and long lists, as I roughly understand it. No, actually, both can be used for infinite choices or finite choices. The primary difference to me is purity: sources break apart the token functionality--an aspect of display that widgets need--from the data definition. Up until fairly recently (i.e., post-3.2, I believe) you couldn't even express a finite source. There are still more vocabulary widgets than source widgets in zope.app.form. Sources are slated to replace vocabularies, but the uptake has been slow: I don't know of a hard date. Gary ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Referencing objects in auto-generated forms
Frank Burkhardt wrote: On Sat, Apr 15, 2006 at 08:41:57AM -0700, Ruben Gutierrez wrote: I'm having trouble understanding some of the semantics or conventions with Zope. One simple question I have is how do I create a list of selectable values in a form. Sounds like a classic use case for a vocabulary. Frank, I thought vocabularies were being de-emphasized though, in favor of the newer 'sources' component? Vocabularies were good for short lists of choices, but because it read them all into memory at once not so good at lazy evaluation. Sources supposedly uses an iterator and is good for both short and long lists, as I roughly understand it. -Jeff ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
