May 2001 - Zope - Zope lists

dtml-in batching improved
by Ivo van der Wijk 31 May '01

31 May '01

Hi all, I'm reposting this here as I think this is of interest to non-developers as well, and I don't get much response on zope-dev anyway :) When using batching in dtml-in, why is 'previous-sequence' only defined at the first iteration of the current batch? And why is 'next-sequence' only defined at the last iteration of the current batch? This behaviour makes it difficult to display a batch like this: -- begin sample -- Item N Item N+1 Item N+2 (link to previous items) (link to next items) -- end sample -- Because the code would be something like: -- begin sample -- <dtml-in something start=query_start size=3> [do something with sequence-item] <dtml-if sequence-end>  <dtml-if previous-sequence> (link to previous items) </dtml-if> <dtml-if next-sequence> (link to next items) </dtml-if> </dtml-if> </dtml-in> -- end sample -- However, if your batchsize is larger than 1, 'previous-sequence' will always be untrue at the last item (when sequence-item is true). The only solution would be implement a second dtml-in after the first one purely for displaying the previous link. Also, dtml-in would re-execute your "expr" (which it does not very efficiently), so if you want to avoid doing the "expr" twice, you'd have to store it temporarily using dtml-let (or my dtml-set tag ;). The end result would be: -- start sample -- <dtml-let foo="expr"> <dtml-in foo start=start_query size=3> [do something with sequence-item] </dtml-in> <dtml-in foo start=start_query size=3>  <dtml-if sequence-end> <dtml-if previous-sequence> (link to previous items) </dtml-if> <dtml-if next-sequence> (link to next items) </dtml-if> </dtml-if> </dtml-in> </dtml-let> -- end sample -- And at this point I really would start to implement the batching myself in python :) Of course, basically the same applies if you want both the previous/next link at the top of the batch display. (Imagine you want both! :) Either I'm missing something really obvious here, or the patches below make sense. There are two versions: - patch #1: This version fixes the issue above by enabling the values of previous/next-sequence throughout the entire batch (and other related variables as well: X-sequence, X-sequence-start-index, X-sequence-end-index, X-sequence-size) (which may break existing sites), and - patch #2: This version introduces new variablenames, leaving the behaviour of previous/next-sequence. A third alternative would be to only define the variables at the top and bottom of the batch. Both versions fix (I think) a grammatical error. It's up to the DC guys if they feel like incorporating either of these patches in a next release :) patch #1: define variables everywhere in the batch This patch makes sure that the following variables are available through each iteration of dtml-in, for each item. !!!!! This patch may break alot of dtml code !!!!!! next-sequence next-sequence-start-index next-sequence-end-index next-sequence-size previous-sequence previous-sequence-start-index previous-sequence-end-index previous-sequence-size -- patch begins here -- *** Zope-2.3.2-orig/lib/python/DocumentTemplate/DT_In.py Fri Apr 13 21:30:38 2001 --- Zope-2.3.2-src/lib/python/DocumentTemplate/DT_In.py Tue May 29 19:52:36 2001*************** *** 583,611 **** for index in range(first,end): # preset kw['previous-sequence']= 0 ! kw['next-sequence']= 0 # now more often defined then previously # ! if index==first or index==last: ! # provide batching information ! if first > 0: ! pstart,pend,psize=opt(0,first+overlap, ! sz,orphan,sequence) ! if index==first: kw['previous-sequence']=1 ! kw['previous-sequence-start-index']=pstart-1 ! kw['previous-sequence-end-index']=pend-1 ! kw['previous-sequence-size']=pend+1-pstart ! try: ! # The following line is a sneaky way to ! # test whether there are more items, ! # without actually computing a length: ! sequence[end] ! pstart,pend,psize=opt(end+1-overlap,0, ! sz,orphan,sequence) ! if index==last: kw['next-sequence']=1 ! kw['next-sequence-start-index']=pstart-1 ! kw['next-sequence-end-index']=pend-1 ! kw['next-sequence-size']=pend+1-pstart ! except: pass if index==last: kw['sequence-end']=1 --- 583,610 ---- for index in range(first,end): # preset kw['previous-sequence']= 0 ! kw['next-sequence']= 0 # now more often defined than previously # ! # provide batching information ! if first > 0: ! pstart,pend,psize=opt(0,first+overlap, ! sz,orphan,sequence) ! kw['previous-sequence']=1 ! kw['previous-sequence-start-index']=pstart-1 ! kw['previous-sequence-end-index']=pend-1 ! kw['previous-sequence-size']=pend+1-pstart ! try: ! # The following line is a sneaky way to ! # test whether there are more items, ! # without actually computing a length: ! sequence[end] ! pstart,pend,psize=opt(end+1-overlap,0, ! sz,orphan,sequence) ! kw['next-sequence']=1 ! kw['next-sequence-start-index']=pstart-1 ! kw['next-sequence-end-index']=pend-1 ! kw['next-sequence-size']=pend+1-pstart ! except: pass if index==last: kw['sequence-end']=1 -- end -- patch #2: introduce new variables This patch introduces the variables batch-next-sequence batch-next-sequence-start-index batch-next-sequence-end-index batch-next-sequence-size batch-previous-sequence batch-previous-sequence-start-index batch-previous-sequence-end-index batch-previous-sequence-size Which behave exactly the same as the variables withouth 'batch-' in front, but these are available with each iteration/item of dtml-in, not just the first/last. This patch should not break any existing dtml code. -- patch begins here -- *** Zope-2.3.2-orig/lib/python/DocumentTemplate/DT_In.py Fri Apr 13 21:30:38 2001 --- Zope-2.3.2-src/lib/python/DocumentTemplate/DT_In.py Tue May 29 20:23:24 2001 *************** *** 583,589 **** for index in range(first,end): # preset kw['previous-sequence']= 0 ! kw['next-sequence']= 0 # now more often defined then previously # if index==first or index==last: # provide batching information --- 583,609 ---- for index in range(first,end): # preset kw['previous-sequence']= 0 ! kw['next-sequence']= 0 # now more often defined than previously ! # provide batching information ! if first > 0: ! pstart,pend,psize=opt(0,first+overlap, ! sz,orphan,sequence) ! kw['batch-previous-sequence']=1 ! kw['batch-previous-sequence-start-index']=pstart-1 ! kw['batch-previous-sequence-end-index']=pend-1 ! kw['batch-previous-sequence-size']=pend+1-pstart ! try: ! # The following line is a sneaky way to ! # test whether there are more items, ! # without actually computing a length: ! sequence[end] ! pstart,pend,psize=opt(end+1-overlap,0, ! sz,orphan,sequence) ! kw['batch-next-sequence']=1 ! kw['batch-next-sequence-start-index']=pstart-1 ! kw['batch-next-sequence-end-index']=pend-1 ! kw['batch-next-sequence-size']=pend+1-pstart ! except: pass # if index==first or index==last: # provide batching information -- To apply either of them, cd to your SOFTWARE_HOME (i.e. Zope-2.3.2-src) and patch -p1 < /location/of/patch NOTE! It only makes sense to apply one of these patches, not both! Cheers, Ivo -- Drs. I.R. van der Wijk -=- Brouwersgracht 132 Amaze Internet Services V.O.F. 1013 HA Amsterdam -=- Tel: +31-20-4688336 Linux/Web/Zope/SQL Fax: +31-20-4688337 Network Solutions Web: http://www.amaze.nl/ Consultancy Email: ivo(a)amaze.nl -=-

2 1

another STX annoyance
by Chris Ryland 31 May '01

31 May '01

You can end a link with a period (which gets left out of the URL), but not with a comma (for obvious reasons, I guess). This is quite frustrating when you have a series of links "foo":foo, "bar":bar, "bletch":bletch. The first two commas get included as part of the URL. Using a space before the comma works, but then there's an ugly space in the result. Any suggestions? Any chance of not including commas, or of some further quoting such as "foo":"foo", "bar":"bar", etc.? I know I'm tilting at the wind here... -- Cheers! Chris Ryland Em Software, Inc. www.emsoftware.com

2 1

RE: [Zope] MailForm
by Max Møller Rasmussen 31 May '01

31 May '01

> From: Jason C. Leach [mailto:jleach@mail.ocis.net] > That's it. After that is a HR and some troubleshooting > suggestions. no > more error output. You probably have a fault header. Remember that whitespaces DO matter when using a MailHost. So no empty lines where there shouldn't be etc. And remember to use all the nessecary fields. regards Max M

3 2

Looking for a timer
by Robert Rottermann 31 May '01

31 May '01

Hi there, is there a way to poll for a flag and go to hibernation for a given amount of time if it is not set. thanks for your tips. Robert

4 6

Customizing / borrowing code from /manage/ screens
by Anders Schneiderman 31 May '01

31 May '01

I just started playing w/ Zope, and I'm trying to do a simple Intranet site to show my bosses what Zope can do. I like the way Zope handles content management through /manage/. I'd like to use a slightly customized, simpler version for our users. Is there an easy way to do this, either by customizing or borrowing existing code? Thanks, Anders Schneiderman SEIU International P.S. If this question has been answered elsewhere, just let me know where to look; I couldn't find it when I poked around, but I might not have known the right heading to seek.

3 5

zSQL syntax
by Sebal 31 May '01

31 May '01

I have a problem with a query, and I hope it's not a zope bug I have 2 tables 'tabdef_theme'[ntheme,valtheme] and 'tab_theme'[ntheme,ndoc] this query#1 works: SELECT t1.valtheme FROM tabdef_theme AS t1 , tab_theme AS t2 WHERE t2.ndoc =<dtml-var numero_doc> AND t1.ntheme = t2.ntheme GROUP BY t1.valtheme ORDER BY t1.valtheme and query#2 too: SELECT t1.ntheme FROM tabdef_theme AS t1 , tab_theme AS t2 WHERE t2.ndoc =<dtml-var numero_doc> AND t1.ntheme = t2.ntheme GROUP BY t1.valtheme ORDER BY t1.valtheme BUT this one query#3 SELECT t1.ntheme , t1.valtheme <<<<<<<<<<<<<<<<<< FROM tabdef_theme AS t1 , tab_theme AS t2 WHERE t2.ndoc =<dtml-var numero_doc> AND t1.ntheme = t2.ntheme GROUP BY t1.valtheme ORDER BY t1.valtheme I get:  this seems to be the correct SQL syntax (from mySQL reference manual) I tried SELECT t2.ntheme , t1.valtheme SELECT * SELECT t1.* => nothing works ... THANX () / \ | <> | (____) zazen rules ... _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/

2 1

zope and mod_rewrite
by jacob walcik 31 May '01

31 May '01

i'm using zope w/ apache (fast_cgi if that's important) and trying to setup a series of virtual hosts. the virtual hosts themselves work just fine, as to the /image directories i've defined within them, however when i try and hit the virtualhost directly via the url "utilities.mycompany.com" it dumps me into the zope management interface at the root of the folder that i am trying to setup as the root of the virtual host. i'm pretty sure this is due to me screwing up this rewrite rule: RewriteRule ^/(.*) http://localhost:8080/VirtualHostBase/http/utilities.iensemble.com:80/utili… (that's all one line in the httpd.conf) i generated that based on the blurb the virtualhostmonster i created spat out. is there something obvious i've done wrong here? -- jacob walcik jwalcik(a)notwithstanding.org

2 4

Import error
by Tamas Amon 31 May '01

31 May '01

Hello, I try to import some *.zexp file, what I download from zope.org. But I always get the: No module named Renderable Why it is? And how I can solve this problem? Thanks a lot -- Amon Tamas sajt(a)amon.hu

4 4

differentiate dtml method from document
by dave＠kovach.com 31 May '01

31 May '01

Hi - Is there a suffix I can add to DTML Methods that would then be recognized by the ZODB upon creating an object externally like from within Dreamweaver? If I create an object externally and call it SOMEFILE.DTML - it is recognized as a DTML Document. Ok, good. But, now I want to create a file that will be recognized as a DTML METHOD. Any ideas? Thanks David Kovach

3 3

Re: [Zope] differentiate dtml method from document
by dave＠kovach.com 31 May '01

31 May '01

Though, if I have to ask - I probably shouldnt be asking... but what is PUT_factory? BTW, I find Homesite and the Zope Extensions for it to be the best editing solution thus far - using its FTP engine. No errors - no issues - no nonsense like Dreamweaver. It was acting pretty eratic with different files. Homesite = better. Just FYI. Still, need a way to differentiate between different objects. Would be nice. What in the ZODB tracks the TYPE of an object that is created there? I tried copying to duplicate a METHOD object and when I would go back into the ZMI it would not know what the object was? I figured at least if I could copy a METHOD in Homesite - delete its content - add new content and rename it - that ZODB would still recognize it as its original object type. But it didnt. Sincerely, David On Thu, 31 May 2001, "Chris Withers" wrote: > > > > Any ideas? > > > > Yes: see my latest feature request on this list a week ago: it's not > > possible yet, but at least Evan at DC seems to think it's doable in a > future > > version. > > Ooo... I missed that... > > Wouldn't a PUT_Factory do the job though? > > cheers, > > Chris > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://lists.zope.org/mailman/listinfo/zope > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope-dev )

1 0