- Zope - Zope lists

Re: [Zope] external methods
by Service Informatique CHSR 31 Mar '99

31 Mar '99

Hello, >Well, this is an interesting question. In my experience, seldom do people >try to munge the DTML namespace from within an External Method. I guess it >could be done (perhaps by passing the special underscore variable to an >External Method), but I wonder if this is really the best way to solve your >problem. Thanks for your answer. In fact, I want to write external methods to replace DTML methods which work like a charm, but are not very readable (a lot of iterative stuff, given the fact that mySQL doesn't support sub-select) and pretty slow. I have used python for several years right now, but DTML is new for me. My users can search in our news database in several ways, that are covered by different SQL queries. However, the output of all these queries are the same, so I use a single DTML method to display the result. So the name of the ZSQL Method is only known at runtime, and I use something like:  to display the result. The arguments of the query are taken from the namespace. I can also write:      If I want to cook some args before feeding it to the query. All these work from DTML. Now, I want to write this in an external method. def results(self): for record in getattr(self, self.REQUEST['query'])(self): pass # do watever 'query' has to be in the form REQUEST variables (that is not a problem), but I cannot be sure that any arguments that the query need are all accessible through REQUEST. >Well let's see what's going on here. You call my method, it acquires the >REQUEST object and looks for a 'my_var', doesn't see it and returns >'boooo'. so far so good. Now you push a namespace containing only 'my_var' >on to the DTML namespace stack and call the method again. Not surprisingly >the method does the same thing as before, it acquires the REQUEST and finds >that it does not contain 'my_var' so it prints 'boooo'. Finally you call >'my_var' which is found in the DTML namespace and 'my_value' is printed. I wrote this to test wether an external method has access to the entire namespace, or only to REQUEST variables. >So the lesson is: the DTML namespace is not the same thing as the REQUEST >object. So I come back with the question: is there any way to access the DTML namespace from an external method. Apparently there is not >For more on how DTML namespace works see my advanced DTML how-to: > >http://www.zope.org/Documentation/HowTo/DTML > I have already read it. By the way, let me ask you a question (again. I already asked that, but the answer was not very clear, and I finally gave up):  and  are the same. So instead of writing:    I usually write:    But almost everyone told me that  also work. So I wonder: are  and  the same??? The DTML User's guide say that in an expression, variable are not called by default, but _['var0'] calls var0 if possible. >My advice to you is to keep things simple. It's easy to confuse yourself >with the complexities of DTML. In general, I would suggest that your >External Methods take well defined arguments and return results, rather >than modify the objects passed to them. Then allow the DTML to pass those >arguments and munge its own namespace in response to the results of the >External Method. Of course, this schema isn't always the right one. Finally >I would suggest that you, don't munge the DTML namespace from within an >External Method unless you have a good reason to, I think that this would >make the DTML even harder to understand. To keep things simple mean I have to write several times the same external method with different queries and differents arguments each time. this is not what I want. I can remember that in DTML I only need one DTML Method. I would really like to replace some of my DTML Methods with external methods. That's enough for today. Let's take some rest :-) Regards, Jephte CLAIN, Service Informatique CHSR

1 0

RE: [Zope] Frustrating
by Shaw, Howard 31 Mar '99

31 Mar '99

First thing, if your product is broken you won't get anywhere. So, first step is to delete the broken product, and shutdown and restart your zope server. This is because Zope apparently won't replace a broken product with a working one. If it is still broken, click on it, and then on the screen that comes up, look for the 'traceback' tab on the top of the screen. Copy this traceback and mail it to the list. If your product no longer says broken, then you will be able to go to a folder above where you want to use SQL methods, and from the pull-down menu beside the add button, choose to install the SQL Adapter. I don't know for certain the format for the connection string, but if you go to <zope_homedir>/lib/python/Products/ and look in the directory for the ZPyGreSQLDA and read the top of any *.py file you see, it should say. Once you have a working adapter, you can add an SQL Method, and it will list your adapter's id on its list of db connections. >From this point on the documentation in the SQL Guide should be sufficient. Good luck! Howard C. Shaw III Programmer/SysAdmin St. Thomas High School > ---------- > From: Tom Deprez[SMTP:Tom.Deprez@uz.kuleuven.ac.be] > Sent: Tuesday, March 30, 1999 4:28 AM > To: zope(a)zope.org > Subject: [Zope] Frustrating > > Hi, > > I'm getting really frustrating on this subject. Pff, I believe the > Zope-people have made already a great effort in their documentation. > So I > guess my problem is my own bad english. shhg. > > I finally got the Postgressql adapter compiled, thanks to two great > people! > Thanks for this already. > > But now I'm confused? How to use it in Zope? When I go to the product > management I see the all the installed products including : > ZPyGreSQLDA > (broken product APyGreSQL).... I guess here is already something wrong > (broken... is not a positive word :-( ) > > But then, how can I work with it? How can I use it in Zope...? How can > I > add it to the 'Add list' . I read of a connection string... but where > to > place it? > > Sggh, I've read in the manuals, Q&A, ... but I still don't get how to > use > it.... > > Please, somebody, help...! > > Thanks in advance, > > The Idiot, > > Tom. > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

5 4

Ideas about implementing a dynamic site?
by Mark Interrante 31 Mar '99

31 Mar '99

I am thinking about implementing a dynamic site using zope and as little python as I can get away with. The site is modeled after http://c2.com/cgi/wiki?WikiWikiWeb This is a dynamic site in that all the web pages are dynamically generated and you are allowed to edit any page right from your browser (sound familiar?) and also create new pages very easily. There are many other implementation of wikiwiki (see the WikiWikiClones link). I am interested in any creative ways of dynamically generating the pages and storing the underlying date in the objectDB. Thanks! Mark === ==================================================== Mark Interrante Hewlett Packard mark(a)interwalk.com <or> mark_interrante(a)hp.com _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

1 0

RE: [Zope] External Methods
by Shaw, Howard 30 Mar '99

30 Mar '99

Try >  > <td></td> > <td></td> >  > You can't nest the 's. Howard C. Shaw III Programmer/SysAdmin St. Thomas High School > ---------- > From: JB[SMTP:jimbag@kw.igs.net] > Sent: Tuesday, March 30, 1999 1:27 PM > To: zope(a)zope.org > Subject: [Zope] External Methods > > Please excuse my lack of zoping intuition but I hoped someone could > help > with this problem. I read all the doc's I could find but seem to be > missing something. It goes like this... > I have a ZSQLMethod that returns some tuples. There is a field in the > tuple which I wish to use to lookup an external file and return a > jpeg, > if available. > I've created an external method called 'getPic' which I wish to pass > the > key field to locate the file with but I can't seem to get at the > variable. > e.g > ---------- >  > <td></td> > <td> )" --></td> >  > ---------- > > This doesn't work for reasons not obvious to me. > > I've tried creating a class to handle the records. No go. > Basically, the External method can't get at the vars defined on each > loop thru the sequence returnd from the SQLMethod. > > Any insight would be appreciated. > > thanks > jb > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

1 0

FW: [Zope] Namespace Confusion
by Shaw, Howard 30 Mar '99

30 Mar '99

Once again I forgot to cc the list. Howard C. Shaw III Programmer/SysAdmin St. Thomas High School > ---------- > From: Shaw, Howard > Sent: Tuesday, March 30, 1999 1:38 PM > To: 'rkw(a)dataplex.net' > Subject: RE: [Zope] Namespace Confusion > >  >  >  >  >  >  >  >  > > Howard C. Shaw III > Programmer/SysAdmin > St. Thomas High School > > > ---------- > From: Richard Wackerbarth[SMTP:rkw@dataplex.net] > Reply To: rkw(a)dataplex.net > Sent: Tuesday, March 30, 1999 1:19 PM > To: zope(a)zope.org > Subject: [Zope] Namespace Confusion > > I'm trying to convert shell scripts into DTML methods. > > Please excuse the pseudo code. I'm using it to represent the problems > that I am addressing. > > set basket_total=0 > set taxable_total=0 > foreach item( 'apple', 'peach', 'soap', 'pear', 'plum', 'magazine' ) > if (! isfood($item)) > @ taxable_total = $taxable_total + price_of($item) > endif > @ basket_total = $basket_total + price_of($item) > endfor > print "Of the $basket_total total, $taxable_total is taxable" > > > 1) Can I generate an explicit list rather than getting it with > as the result of either a database query or enumeration of an object? > > 2) How do I generate "local" variables. > I know that I could use the REQUEST variable as a global property > store. > However, because of nesting, global (REQUEST) variables are not > desirable. > > I'd like to say something like the following: > >  >  > ... >  > ... >  > ... >  > > Does Zope's DTML have constructs to address either of these? > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) > >

1 0

External Methods
by JB 30 Mar '99

30 Mar '99

Please excuse my lack of zoping intuition but I hoped someone could help with this problem. I read all the doc's I could find but seem to be missing something. It goes like this... I have a ZSQLMethod that returns some tuples. There is a field in the tuple which I wish to use to lookup an external file and return a jpeg, if available. I've created an external method called 'getPic' which I wish to pass the key field to locate the file with but I can't seem to get at the variable. e.g ----------  <td></td> <td> )" --></td>  ---------- This doesn't work for reasons not obvious to me. I've tried creating a class to handle the records. No go. Basically, the External method can't get at the vars defined on each loop thru the sequence returnd from the SQLMethod. Any insight would be appreciated. thanks jb

1 0

Namespace Confusion
by Richard Wackerbarth 30 Mar '99

30 Mar '99

I'm trying to convert shell scripts into DTML methods. Please excuse the pseudo code. I'm using it to represent the problems that I am addressing. set basket_total=0 set taxable_total=0 foreach item( 'apple', 'peach', 'soap', 'pear', 'plum', 'magazine' ) if (! isfood($item)) @ taxable_total = $taxable_total + price_of($item) endif @ basket_total = $basket_total + price_of($item) endfor print "Of the $basket_total total, $taxable_total is taxable" 1) Can I generate an explicit list rather than getting it with as the result of either a database query or enumeration of an object? 2) How do I generate "local" variables. I know that I could use the REQUEST variable as a global property store. However, because of nesting, global (REQUEST) variables are not desirable. I'd like to say something like the following:   ...  ...  ...  Does Zope's DTML have constructs to address either of these?

1 0

Template Printing from Zope
by Jason Spisak 30 Mar '99

30 Mar '99

I would like to trigger a DTML document to print after the user creates it. ( There are a few documents in my project that need to be snail mailed) Circumstances aside, they aren't allowed to print from Navigator, so I'd like Zope to shoot it out without the user having to have a printer configured. If a printer is configured to work with the server, can Zope send it to lpr? I have zero experience there. :-( Any suggestions? Jason Spisak webmaster(a)mtear.com

2 2

RE: DTML question
by Amos Latteier 30 Mar '99

30 Mar '99

> Sorry to bother you with these questions but I can't post to > egroups. I > tried senting messages on friday, saturday, monday and > today but none > went through. I've sent from the egroups post page, and from my > email... no luck. Please feel free to cc the list with > any answers > or pointers to answers. You can post to the list without egroups by sending mail to zope(a)zope.org. You can also read the archives without egroups at http://www.zope.org/pipermail/zope/. > I've been working throught the DTML manual and I've come > across a problem; > I can't get the #in tag > to do what I want with a dictionary. I'm using it from > Python for now, but > plan to use this within a Zope app soon. > > > The following DTML code exits with this error: "...line 641, > in renderwob > l-len(sequence)" > >  >   >  I think what you want is access to the dictionary's items() right?   :   The mapping attribute is not relevant here. It means treat sequence-items as mappings not instances, that is to say, look up vars with __getitem__, not __getattr__. The DTML User's Guide is your friend. -Amos

1 0

Re: [Zope] external methods
by Service Informatique CHSR 30 Mar '99

30 Mar '99

>Nope, > >With that definition, my_method expect to be called with the arguments >set, eg  to display "Zope is cool". > >However, I want to get the variable l from the namespace. (application >variables made with REQUEST.set, Folder or document properties, etc.) >The question was: is self.REQUEST the only way to access the >variable namespace? And the only way to *modify* the variable namespace >from external methods (with self.REQUEST.set)? I'd like to be more precise. Suppose my_method is: def my_method(self): if self.REQUEST.has_key('my_var'): return "oh yes" return "boooo" Now, I write in DTML:      Believe me or not, the result is: boooo boooo my_value You can now understand why I ask how to access the variable namespace from external methods. How can I test the existence of my_var, and access its value??? Keep the good work, I might ask you some of your photos for my daily worship :-) Regards, Jephte CLAIN Service Informatique

2 1