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Parse.
by Juan Javier Carrera Obrero 13 Sep '00

13 Sep '00

Hi ! We are using Zope 2.1.6 for Windows NT Server, and Oracle 8i as RDBMS. When the ZSQL methods are runned, the values of the parameters of the SQL query are remplaced by Zope before sending the query to the Oracle database jet (it does not the "parse"). Thus, if two users runs the same query but with different parameters, it is considered as two different queries because the values of the parameters of the ZSQL method are remplaced firstly. When it is realized by more users with diferent parameters, the Oracle's cache is fulling quickly and it is overing. Do exists any way for sending the query of the ZSQL method and theirs parameters, trying that the values of the parameters was remplaced in the database jet, and no previously. Perhaps, it was a ODBC problem, or the Zope code does not allow it. I do not know it. Any body can help me ? Thanks. JUAN JAVIER CARRERA OBRERO e-mail: jcarrera(a)uco.es

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Re: [Zope-dev] Custom dtml tag
by Brett Carter 13 Sep '00

13 Sep '00

Andy: here's what I've gleaned - in a dtml tag's render() method, you get passed in self and a template dict, in my example let's call it 'md'. md is essentially a stack/dictionaryish object of the *current* namespace - and one of the handy things that's always around in the namespace is the 'this' function, which returns the object on the top of the stack. Just lookup 'this', run it, and there you have a reference to the calling object! Ex: def render(self, md) this = md.getitem('this') callingObj = this() return "Calling object was %s" % (callingObj.id()) Note I haven't tested this code. Good luck! -Brett >>>>> "Andy" == Andy McKay <andym(a)ActiveState.com> writes: Andy> I can see how this would be useful in a situation where I dont have an Andy> instance of self. But in this case I do, so Im not sure how this helps. Andy> I guess you're saying once I have self I can find out what called the Andy> function. More fiddling I guess. Andy> ----- Original Message ----- Andy> From: "Martijn Pieters" <mj(a)digicool.com> Andy> To: "Andy McKay" <andym(a)activestate.com> Andy> Cc: <zope-dev(a)zope.org> Andy> Sent: Tuesday, September 12, 2000 11:29 AM Andy> Subject: Re: [Zope-dev] Custom dtml tag >> On Tue, Sep 12, 2000 at 09:26:49AM -0700, Andy McKay wrote: >> > Hmm well ive found i have <TemplateDict> object and of course my self. >> > Perhaps there is a pythonism I have to research here. >> > >> > ----- Original Message ----- >> > From: "Andy McKay" <andym(a)ActiveState.com> >> > To: <zope-dev(a)zope.org> >> > Sent: Monday, September 11, 2000 4:03 PM >> > Subject: [Zope-dev] Custom dtml tag >> > >> > >> > > Im playing with a custom dtml-tag along the lines of <dtm-query foo> >> > > constructs a url to a catalog query. It works fine, I would just like Andy> to >> > > extend it a bit and for this I would need to get to the calling Andy> object. >> > > >> > > For example, there will be a different query depending upon the object Andy> the >> > > dtml-query tag is contained in. Does this make sense, does anyone know Andy> the >> > > answer? >> > > >> > > Thanks in advance. >> > > >> > > -- >> > > Andy McKay, Developer. >> > > ActiveState. >> >> The namespace just reflects the attributes of the current object, plus >> whatever other tags push onto that stack (such as the in tag, which pushes >> the current element of the list it iterates over on top). >> >> If you retrieve the 'this' method from the stack, and call it, it'll >> return the topmost object on the stack. It is implemented in >> SimpleItem.Item: >> >> def this(self): >> # Handy way to talk to ourselves in document templates. >> return self >> >> -- >> Martijn Pieters >> | Software Engineer mailto:mj@digicool.com >> | Digital Creations http://www.digicool.com/ >> | Creators of Zope http://www.zope.org/ >> | ZopeStudio: http://www.zope.org/Products/ZopeStudio >> ----------------------------------------------------- >> Andy> _______________________________________________ Andy> Zope-Dev maillist - Zope-Dev(a)zope.org Andy> http://lists.zope.org/mailman/listinfo/zope-dev Andy> ** No cross posts or HTML encoding! ** Andy> (Related lists - Andy> http://lists.zope.org/mailman/listinfo/zope-announce Andy> http://lists.zope.org/mailman/listinfo/zope )

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Custom dtml tag
by Andy McKay 12 Sep '00

12 Sep '00

Im playing with a custom dtml-tag along the lines of <dtm-query foo> constructs a url to a catalog query. It works fine, I would just like to extend it a bit and for this I would need to get to the calling object. For example, there will be a different query depending upon the object the dtml-query tag is contained in. Does this make sense, does anyone know the answer? Thanks in advance. -- Andy McKay, Developer. ActiveState.

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Re: [Zope-dev] Acquisition in a DTML Tag
by Brett Carter 12 Sep '00

12 Sep '00

>>>>> "Shane" == Shane Hathaway <shane(a)digicool.com> writes: Shane> Brett Carter wrote: >> >>>>> "Brett" == Brett Carter <brett(a)kavi.com> writes: >> Brett> I've defined my own dtml tag (i.e. <dtml-foo></dtml-foo>) Brett> and I am trying to look up an object depending on the Brett> arguments passed to my tag. The python class that defines Brett> the tag inherits from Acquisition.Implicit, but 'self' Brett> doesn't contain any of the Acquisition hiarchy. It seems Brett> like this must be possible, since the <dtml-var> tag must Brett> have to do an object lookup somewhere for objects passed to Brett> it to render. Can anybody shed some light on this? Is it Brett> doable? TIA -Brett >> Ok, So after some *major* hacking, i've realized that the 'md' >> passed into the render() method of my dtml tag contains the >> namespace, and is of type 'TemplateDict' which appears to >> contain a stack of 'MultiMapping's. Weird. Well, anyways, I >> just used the 'has_key' and 'getitem' methods to lookup my >> item. The question now is how do I create a new object in the >> current namespace? It looks like the TemplateDict is a >> read-only type of data structure. Anybody? TIA -Brett Shane> Look at render() of DT_With.py. It does an Shane> md._push(<mapping containing new names>) then, in a Shane> try/finally clause, calls DT_Util.render_blocks(). In the Shane> finally clause, it does md._pop(). Shane> Shane I'm still confused. Ok, so render gets passed 'md', which is a TemplateDict, which contains a MultiMapping, which looks like a stack of dictionaries, which I am guessing is some sort of namespace stack. So looking at the DT_with.py, it looks like, to create an object in the current namespace, I have to wrap it in an InstanceDict, and push it onto the 'md' using 'md._push'. Does this also cause the new object to be saved in the ZODB? Or do I have to manually add it there too? Also, what does render_blocks do? Why does DT_with.py's render() return it? Do I have to run render_blocks() to insert my new object into the namespace? TIA -Brett

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Re: [Zope-dev] Custom dtml tag
by Brett Carter 12 Sep '00

12 Sep '00

>>>>> "Andy" == Andy McKay <andym(a)ActiveState.com> writes: Andy - see the thread I started called 'Acqusition in a DTML tag' I have a similar question. -Brett Andy> Hmm well ive found i have <TemplateDict> object and of Andy> course my self. Perhaps there is a pythonism I have to Andy> research here. Andy> ----- Original Message ----- From: "Andy McKay" Andy> <andym(a)ActiveState.com> To: <zope-dev(a)zope.org> Sent: Andy> Monday, September 11, 2000 4:03 PM Subject: [Zope-dev] Andy> Custom dtml tag >> Im playing with a custom dtml-tag along the lines of <dtm-query >> foo> constructs a url to a catalog query. It works fine, I >> would just like to extend it a bit and for this I would need to >> get to the calling object. >> >> For example, there will be a different query depending upon the >> object the dtml-query tag is contained in. Does this make >> sense, does anyone know the answer? >> >> Thanks in advance. >> >> -- Andy McKay, Developer. ActiveState. >> >> >> >> >> _______________________________________________ Zope-Dev >> maillist - Zope-Dev(a)zope.org >> http://lists.zope.org/mailman/listinfo/zope-dev ** No cross >> posts or HTML encoding! ** (Related lists - >> http://lists.zope.org/mailman/listinfo/zope-announce >> http://lists.zope.org/mailman/listinfo/zope ) >> Andy> _______________________________________________ Zope-Dev Andy> maillist - Zope-Dev(a)zope.org Andy> http://lists.zope.org/mailman/listinfo/zope-dev ** No cross Andy> posts or HTML encoding! ** (Related lists - Andy> http://lists.zope.org/mailman/listinfo/zope-announce Andy> http://lists.zope.org/mailman/listinfo/zope )

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Bug in OFS/Traversable.py
by David Alexander Ranvig 12 Sep '00

12 Sep '00

The unrestrictedTraverse method creates a fake REQUEST "object" (really a dictionary) and sends this to a __bobo_traverse__. If this __bobo_traverse__ uses the object properties of the REQUEST object, or needs the real REQUEST object it will fail. If __bobo_traverse__ raises an exception while being called from the unrestrictedTraverse method, which may easily happen if the author of the __bobo_traverse__ method expected a real REQUEST object, unrestrictedTraverse just raises the Unauthorized exception. This is extremely confusing. I would much appreciate that the _real_ REQUEST object was sent to my __bobo_traverse__, and that the exception propagated is a little more informative. I have worked around this problem like this, def __bobo_traverse__(self, REQUEST, name): if type(REQUEST) == type({}): # do something else: # do what I really wanted to do but would appreciate if the problem did not exist :-) -- Regards David.

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Re: [Zope-dev] PATH_TRANSLATED delimted with backslash ?
by Dieter Maurer 11 Sep '00

11 Sep '00

Steve Alexander writes: > .... > When I look at the DTML Document through the web, the "self" object > passed to the breadcrumbs external method is the folder that contains > the DTML Document. > (I thought that should only be the case for DTML Methods!) I expect, it is the folder containing the external method, too. Therefore, you get this folder as "self". You can provide the "self" explicitly in your call: <dtml-call "breadcumbs(this(),<further parameters>)"> Dieter

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User Info Folder Product Released
by Didier Frick 11 Sep '00

11 Sep '00

Hi all, I just released a Zope product, but since I'm a Zope newbie I'm still wondering whether there is something fundamentally wrong with my idea or not. Could someone check that thing and tell me whether I'm completely off base ? I'm pretty sure there would be a way to solve the same problem using ZPatterns, but I'm still at the very beginning of the learning curve, so I'd rather do with something without too many dependencies. Anyway, here's the product's blurb: User Info Folders maintain a collection of ZClasses synchronized with a user folder. You can specify the name of the product and the name of the ZClass in this product. The User Info Folder will then automatically maintain one instance of the specified ZClass for each user in the "nearest" User Folder in the hierarchy (the acquired 'acl_users' object). This can be very useful if you want to create ZClasses representing user-specific information: an instance of this ZClass will be automatically maintained by the User Info Folder for each user, allowing it to be referenced by URLs. The URL for the product is http://www.zope.org/Members/did/UserInfoFolder Thanks for your feedback, Didier -- Didier Frick Freelance Software Developer & Consultant http://www.dfr.ch/

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Z SQL Method Patch
by Casey Duncan 11 Sep '00

11 Sep '00

In debugging some Z SQL methods I found it quite hard to diagnose certain errors returned by the database backend because Zope doesn't return the SQL sent to the server, instead it returns "Could not render the query template!" which is not really true for this case. In looking at the source code of DA.py (lib/python/Shared/DC/ZRDB), and I think I found a simple solution: in manage_test insert the following indented after line 343 (except:) try: src=self(REQUEST, src__=1) except: pass This re-renders the query template if possible without sending it to the backend and returns the SQL in src. The result is your backend error message followed by the SQL generated. This should really save time debugging any dynamic Z SQL methods. It was moderately tested on Zope 2.2.1/PostgreSQL 7 via PyGreSQLDA. It should not be database dependant though. Enjoy. -Casey Duncan

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ZPatterns: Error reimporting .zexp containing Folder w/ Customizer Support Support
by Steve Alexander 11 Sep '00

11 Sep '00

I have a customizer folder with various data-plugins and customizers. I just exported it from one zope installation, for importing into one on a different server. The installations are more or less identical -- same zope version, same products. When I try to reimport it, I get the following error: Error Type: TypeError Error Value: No data plug-ins available to link to in /emb Traceback (innermost last): File lib/python/ZPublisher/Publish.py, line 222, in publish_module File lib/python/ZPublisher/Publish.py, line 187, in publish File python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File lib/python/ZPublisher/Publish.py, line 171, in publish File lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_importObject) File lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_importObject) File lib/python/OFS/ObjectManager.py, line 535, in manage_importObject (Object: ApplicationDefaultPermissions) File lib/python/OFS/ObjectManager.py, line 290, in _setObject (Object: ApplicationDefaultPermissions) File lib/python/Products/ZPatterns/PlugIns.py, line 211, in manage_afterAdd (Object: PlugInBase) File lib/python/OFS/ObjectManager.py, line 298, in manage_afterAdd (Object: PlugInBase) File lib/python/Products/ZPatterns/PlugIns.py, line 211, in manage_afterAdd (Object: Transactional) File lib/python/OFS/ObjectManager.py, line 298, in manage_afterAdd (Object: Transactional) File lib/python/Products/ZPatterns/PlugIns.py, line 64, in manage_afterAdd (Object: PlugInBase) File lib/python/Products/ZPatterns/PlugIns.py, line 120, in _addPlugIn (Object: Transactional) File lib/python/Products/ZPatterns/PlugIns.py, line 168, in manage_refreshPlugIns (Object: Transactional) File lib/python/Products/ZPatterns/PlugIns.py, line 332, in manage_refreshPlugIns File lib/python/Products/ZPatterns/Providers.py, line 101, in _PlugInsChanged File lib/python/Products/ZPatterns/Providers.py, line 178, in namesForRegistration (Object: PlugInBase) TypeError: (see above) I'll start to look into this. Any advice would be most welcome. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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