December 1999 - Zope

GUF-SQL and Members area
by JB 16 Dec '99

16 Dec '99

Does anyone have any tales around getting GUF to authenticate out of a SQL connection. I've managed to get GUF setup and working. Then I went thru the How-To by 'hippy', but of course, now it doesn't work and I get no errors, reports, hiccups or rumbles. I simply get to login in, over and over again. I wondered if anyone had had some success with this and if so, could they share. Also, while I'm on this, could anyone tell me how DC handles the Members area at Zope.org. This is exactly what I am trying to do with GUF and would happily copy the Zope site method if that info were available. In fact, I'd be happy to document the method if there were some way I could get a heads up. Thanks jim -- In a five year period we can get one superb programming language. Only we can't control when the five year period will begin.

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RE: [Zope] Organizing large projects
by Rob Page 16 Dec '99

16 Dec '99

Hi Timothy: > This is probably a silly question, but here goes anyway. Not at all! I think it's a great question! > I am working on my first large (for money) Zope project. I > have created > a folder for the entire project, but have found that I am getting so > many objects in the root folder to the project that it is > becoming hard > to manage. > > My first inclination is to create sub-folders for each type of object > (e.g., SQLMethods and connections, forms, images, etc.) but something > tells me this is not a good plan. > > What organizational schemes have you found that work well for you? You might try something like this: MyApp UserFolder AppCommonThing1 AppCommonThing2 --Actors ActorCommonThing1 ActorCommongThing2 +--Admin +--UseCase1 sqlGetSeomthingForUseCase1 dtDisplaySomeResults +--UseCase2 +--UseCase3 +--Cook +--Baker +--CandlestickMaker Essentially this is a decomposition along Use Case boundaries. If you do this it becomes VERY easy to lay in Zope security on the application since you've already segregated all of the applications roles (i.e., Actors). Below the Actors level (e.g., the stuff below Admin) it might be overkill to assign different folders per Use Case. However, as we've seen, if the Actor has a LOT to do then it's worth separate folders just to keep the management/development UI sane. Does this make sense? HTH, --Rob

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ZODB/PersistentMapping problem
by Paul Stevens 16 Dec '99

16 Dec '99

Hi all, I've been experimenting with the ZODB and Persistence modules following the ZODB-Howto. Using the example code I've seem to have encountered a problem in PersistentMapping.py: PersistentMapping.keys() does, apparently not support int keys: def keys(self): try: return self._v_keys except: pass keys=self._v_keys=filter( lambda k: k[:1]!='_', self._container.keys()) keys.sort() return keys will cause Traceback (innermost last): File "./hello.py", line 73, in ? myapp.testread() File "./hello.py", line 67, in testread print self.root.keys() File "/usr/lib/zope/lib/python/ZODB/PersistentMapping.py", line 142, in keys self._container.keys()) File "/usr/lib/zope/lib/python/ZODB/PersistentMapping.py", line 140, in <lambda> lambda k: k[:1]!='_', TypeError: unsliceable object when using int keys. Is this a bug or a feature ?? Using instead: def keys(self): try: return self._v_keys except: pass keys=self._v_keys=filter( # lambda k: k[:1]!='_', lambda k: str(k)[:1]!='_', self._container.keys()) keys.sort() return keys appears to do the job. But I cannot predict unforeseen consequences from this hack. ------------------------------- hello.py -------------------------------------- #!/usr/bin/python import Persistence import ZODB import ZODB.FileStorage class Person(Persistence.Persistent,Persistence.PersistentMapping): def __init__(self,name='',age=''): self.name = name self.age = age def __repr__(self): return """Person(name='%s',age='%s')""" % ( self.name, self.age ) class MySimpleZODBApp: """ A simple application object that manages persistent object's of the 'Person' class. """ def __init__(self, file='Data.fs'): """ Create a database, connect to it and get the root object out of it. """ self.db = ZODB.DB(ZODB.FileStorage.FileStorage(file)) self.connection = self.db.open() self.root = self.connection.root() self.root.clear() if not len(self.root): self.root['billy'] = Person('Billy', 77) # normally Zope will handle transactions, # but in this special case, we need to # commit the transaction to save the new # persistent object print "get_transaction" get_transaction().commit() def addPerson(self, name, age): """ Adds a 'Person' to the database """ if self.root.has_key(name): raise 'PersonAllReadyExists', "They're allready there" else: self.root[name] = Person(name, age) get_transaction().commit() def delPerson(self, name): """ Deletes a 'Person' from the database """ if self.root.has_key(name): del self.root[name] get_transaction().commit() else: raise 'NoSuchPerson', 'Who?' def testwrite(self): """lots of silly objects""" for x in range(1000): if not (x % 100): # every 100 items # commit a sub transaction get_transaction().commit(1) self.root[x] = Person(str(x), x) # commit all sub-transactions just like normal # sub transactions get_transaction().commit() def testread(self): print self.root.keys() print self.root['billy'] if __name__ == '__main__': myapp = MySimpleZODBApp() myapp.testwrite() myapp.testread() -- ________________________________________________________________ Paul Stevens mailto:paul@nfg.nl NET FACILITIES GROUP PGP: finger paul(a)nfg.nl The Netherlands________________________________http://www.nfg.nl

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How can I delete a user by useing the name of the user?
by jens ebaer 16 Dec '99

16 Dec '99

Hi, I am trying to delete a user by his name. But that doesn´t work. <dtml-call "REQUEST.set('name', Username)"> <dtml-call "acl_users.manage_users(submit='Delete',REQUEST=REQUEST)"> Mybe someone can help me! Thanks Jensebaer ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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(newbie)-Anyone Please Help me
by ozric 16 Dec '99

16 Dec '99

I have Been testing out Zope for possible use at work and I am really stuck. I have a simple dtml method called userid that gets REMOTE_ADDR and stuff. I set up a test_html page and put in it <dtml-var userid>. This works great. now I make a folder called methods with a user interface and acl. I put the useid method into the methods folder. I go back to the root folder and view test_html and it can't find the userid method anymore. So I try <dtml-var methods.userid> and that does not work. What am I doing wrong? Have I missed something basic. I thought that Zope would "traverse" the folders and find the <dtml-var>. I can do a find in Zope and find it in /methods/userid, Do I need to do something different to call the method ? Please Help Rick -- Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damage per incident.

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RE: [Zope] How to write a product.
by Michel Pelletier 16 Dec '99

16 Dec '99

> -----Original Message----- > From: Magnus Heino [mailto:magnus@vuab.net] > Sent: Monday, December 13, 1999 6:59 AM > To: zope(a)zope.org > Subject: [Zope] How to write a product. > > > > Hi. > > I want to write a product, like the calendar in MSOutlook. > People should > be able to add private and public events. Note that there is allready a calendar product written by Ty Sarna, I think the Behive people have one also (or it's based on Ty's code, not sure). http://www.zope.org/Products -Michel

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SQL Methods and namespace question
by Rik Hoekstra 16 Dec '99

16 Dec '99

This problem has been bugging for a long time now and I can't seem to find the answer. I have a database that is searchable with SQL methods. in simple mode the SQL method and the Search Interface work well. Now the problem is when I have a form, which (i thought) would have to be extensible. So I thought to use record-based input forms, like this <searchitem.searchterm:records> # record 1 <searchitem.connector:records (AND/OR/NOT)> <searchitem.searchterm:records> # record 2 <searchitem.connector:records (AND/OR/NOT)> <searchitem.searchterm:records> # record 3 . . . At the moment this has only two fields, but it could also be extended to have a choice of other search fields (Author, Title, Publishing year....), but let's keep it simple. In theory this would be extensible ad nauseam The SQL Method then has the following code to build a query string <dtml-in searchitem> <dtml-if sequence-start>TITEL LIKE <dtml-var expr="'%s%s%s%s%s' %(chr(39), '%', 'searchterm', '%', chr(39))"> <dtml-else><dtml-var connector> TITEL LIKE <dtml-var expr="'%s%s%s%s%s' %(chr(39), '%', searchterm, '%', chr(39))"> </dtml-if> </dtml-in> Whatever I try, this fails with a KeyError for a Key 0 I tracked this down to the dependance of SQL Methods the regular REQUEST keys. If this is right, it means the 'searchterm' and 'connector' of the example would not be available which would explain the KeyError. I found this particularly hard to find out, as using SQL Methods is indirect and database errors may also get in the way. A few questions: - is my analysis correct, or am I way off track - if it is correct, why does it work this way - how can I make this work (I can come with workarounds myself, the point is they all lack flexibility) Rik

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Content-type
by Terry Kerr 16 Dec '99

16 Dec '99

Hi, I am a little confused with how to set the Content-type of the method or document that is being served by zope. I would like to be able to set it to multipart/x-mixed-replace so that I can do some server-push. I have tried the following without success. <dtml-call "REQUEST['RESPONSE'].setHeader('CONTENT_TYPE','multipart/x-mixed-replace')"> <dtml-var "REQUEST['RESPONSE'].setHeader('CONTENT_TYPE','multipart/x-mixed-replace')"> When I do a <dtml-var "REQUEST['RESPONSE'].getHeader('CONTENT_TYPE')"> I just get 'NONE' terry

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Re: [Zope] ZSybase DA w/ Suse Linux
by Anthony Baxter 16 Dec '99

16 Dec '99

Nope - you'll need a newer Sybase client library. See the HOWTO I put on the Zope site about this. Even if you can get it to build with 11.0.3, there appears to be problems inside that version of the client lib when used in multithread mode. http://www.zope.org/Members/anthony/dcSybase-on-linux >>> webman wrote > hello, > > has anybody got the ZSybase DA running with Suse Linux 6.2? > > our Sybase DB is version 11.0.3. considering its also supposed > to work with microsoft sql 6.5 (basically an older licensed > version of sybase) this should be feasible. > > regards, > > webman > > --------------------------------------------------------------------------- > webman | _ > beehive GmbH | ASCII ribbon campaign ( ) > berlin, Germany | - against HTML email X > http://www.beehive.de | & vcards / \ > > > _______________________________________________ > 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 ) -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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Newbie, Please HELP !
by Olivier Deckmyn 16 Dec '99

16 Dec '99

KeyWords : Business Objects, Persistency, ZODB. Hello all, I've been playing with Zope for a few weeks now...I really like it ! The problem I have is that, given a problem, I don't know what Zope technology I should use... Here is my problem : I have designed a small object application with UML. I then have implemented it in python. Only the business rules of my application are written yet (no UI nor GUI). The whole application source is made of 3 python files (.py). Python objects are persistent and stored into a file using the shelves mechanism (that I found to be very simple and handy). I test the core of my application in the console, invoking methods of my objects. Storage is correct, etc... Now that I know that my application "could" work (=all the business rules and methods have the correct behaviour), I want to access it through the web (=make a web application). I would like to use Zope to do so. First, I can modify my existing python code (to make it compliant with any Zope mandatory things - that I don't know yet !). [1 - Dealing with the Storage of my Objects] I don't want to deal with any Relational storage directly. I would like to go on using a full object approach : to have persistent python objects. Use of OQL would be nice, but not mandatory for my first needs. At last, I don't want to have to store/retrieve my objects from a SQL database by hand...The persistent mechanism should be as easy to use and handle as the shelves one(I don't need to use shelves in particular - I just want an object-storage mechanism). There is no need for me to have access to the today-existing datas (that were store in files from the shelves mechanism). [ 2 - Dealing with the visual HTML representation of my objects ] I would like to have a strong frontier between the rendering of data (=production of HTML code) and the logic of my application (=python code that handles the life of my objects). [ 3 - Reusability - Luxe ] I would also like to be able to use the same python code in both the console and web version (not mandatory). Given this, I don't know what Zope mechanism is best for me : ZClasses ?, ZCatalog ? External method ? Other ? Should I make a product ? Where can I put my existing python code ? How will I deploy it to several sites ? How do I store my business objects into ZODB ? If I am not clear enough : you can flame me ! I will explain it again :-) Please help ! Thanx for your support. Olivier Deckmyn, Paris - France.

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