[Zope] Choice of the sorting key of a dtml-in tag

[Andreas Jung]

The sort attribute only allows one key. To sort by multiple keys
you must use _.sequence.sort() (Zope2.4).

==========================================================================
Andreas Jung                                          andreas@digicool.com
Digital Creations           "Zope Dealers"            http://www.zope.org


----- Original Message -----
From: "Jean Lagarde" <jean.lagarde@eer-rc.com>
To: <benoit.dominiak@makinacorpus.com>
Cc: <zope@zope.org>
Sent: Freitag, 13. Juli 2001 16:30
Subject: RE: [Zope] Choice of the sorting key of a dtml-in tag


> Benoit,
>
> I was looking at the source code (I'm trying to figure out how to put
> multiple keys in sort_expr -- it does not accept a list as I first
assumed),
> and found that there is also a reverse_expr attribute which will do
exactly
> what you need.
>
> So you need to use both sort_expr="skey" and reverse_expr="rev" (I think
> that rev=='' will not reverse, but if that doesn't work, try setting rev
to
> None).
>
> Cheers,
>
> Jean
>
> > -----Original Message-----
> > From: Benoit DOMINIAK [mailto:koubonline@hotmail.com]
> > Sent: Friday, July 13, 2001 07:33
> > To: jean.lagarde@eer-rc.com
> > Cc: zope@zope.org
> > Subject: Re: [Zope] Choice of the sorting key of a dtml-in tag
> >
> >
> > Yes !!!
> > That's it !
> > But know, how can I include reverse ;-) ?
> > I've tryed :
> > <a href="<dtml-var URL1>?skey=titre&rev=">Title</a>
> > <a href="<dtml-var URL1>?skey=author&rev=">Author</a>
> > <a href="<dtml-var URL1>?skey=bobobase_modification_time&rev=
> > reverse">Last
> > modification</a>
> >
> > <dtml-if "REQUEST.has_key('skey')">
> > <dtml-else>
> > <dtml-call "REQUEST.set('skey', 'bobobase_modification_time')">
> > <dtml-call "REQUEST.set('rev', ' reverse')">
> > </dtml-if>
> >
> > <dtml-in "objectValues(['article'])" size=3 sort_expr="skey+rev"
> > start=query_start>
> >
> > But it just work with title and author (rev=none) but not with
modif_time
> > (rev=' reverse').
> >
> > Can you help me ?
> >
> > >From: "Jean Lagarde" <jean.lagarde@eer-rc.com>
> > >To: <zope@zope.org>
> > >Subject: Re: [Zope] Choice of the sorting key of a dtml-in tag
> > >Date: Fri, 13 Jul 2001 07:20:31 -0700
> > >
> > >Hi Benoit,
> > >
> > >My first answer post!
> > >
> > >Although I haven't tried that yet, my understanding is that 'sort' only
> > >accepts constants, i.e. it will interpret skey as the literal
> > 'skey', not
> > >as
> > >its value. You need to use the undocumented 'sort_expr' instead, i.e.
> > >
> > ><dtml-in "objectValues(['article'])" size=3 sort_expr="skey"
> > >start=query_start>
> > >
> > >I'm not sure if you can include 'reverse' in skey; you probably have to
> > >state
> > >that separately in the dtml-in tag.
> > >
> > >Hope that solves your problem,
> > >
> > >Do a search on sort_expr on this list for more details.
> > >
> > >Cheers,
> > >
> > >Jean
> > >
> > >On Friday 13 July 2001 15:03, you wrote:
> > >
> > > > Hi again,
> > > >
> > > > I'd like to make a page with a list of my Zclass instances and to be
> > >able
> > >to
> > > > sort them by different key. I tryed with this code :
> > > >
> > > > <dtml-if "REQUEST.has_key('skey')">
> > > > <dtml-else>
> > > > <dtml-call "REQUEST.set('skey', 'bobobase_modification_time
> > reverse')">
> > > > </dtml-if>
> > > > <dtml-in "objectValues(['article'])" size=3 sort=skey
> > start=query_start>
> > > >
> > > > But it doesn't work : instances are not sorted correctly...
> > > >
> > > > Any idea ?
> > >
> > >
> > >
> > >
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