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Dump .zexp export to readable source?
by Alex Khan 07 Nov '00

07 Nov '00

As a newbie it sure would be nice to dump out all the code from a zexp to study the source. I can probably learn more from reading other people's code than by reading the fragmented documentation. I can do this easily with products but not zexp's. Thanks in advance... Alex Khan alex.khan(a)gov.ab.ca <mailto:alex.khan@gov.ab.ca>

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acessing parameters in a "helper class"
by Max M 07 Nov '00

07 Nov '00

I have the below class "mxm_guestbook_base" that is subclassed by a zClass. So far so good. But when in a "index_html" dtml-method I try to acces the value "author" of the "aComment" class returned in the "getAllComments" method like so: <dtml-in getAllComments> <dtml-var author> <dtml-var comment fmt=structured-text> </dtml-in> I get the following traceback: ----------------------------------------------- Traceback (innermost last): File C:\mxmZope\lib\python\ZPublisher\Publish.py, line 222, in publish_module File C:\mxmZope\lib\python\ZPublisher\Publish.py, line 187, in publish File C:\mxmZope\lib\python\ZPublisher\Publish.py, line 171, in publish File C:\mxmZope\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: index_html) File C:\mxmZope\lib\python\ZPublisher\Publish.py, line 112, in call_object (Object: index_html) File C:\mxmZope\lib\python\OFS\DTMLMethod.py, line 172, in __call__ (Object: index_html) File C:\mxmZope\lib\python\DocumentTemplate\DT_String.py, line 528, in __call__ (Object: index_html) File C:\mxmZope\lib\python\DocumentTemplate\DT_In.py, line 691, in renderwob (Object: comments) File C:\mxmZope\lib\python\OFS\DTMLMethod.py, line 194, in validate (Object: index_html) File C:\mxmZope\lib\python\AccessControl\SecurityManager.py, line 139, in validate File C:\mxmZope\lib\python\AccessControl\ZopeSecurityPolicy.py, line 159, in validate Unauthorized: author ----------------------------------------------- It seems that I have a problem accessing values in the objects inserted in self.comments list. If I just self.append('some comment') directly as a string I have no problems acessing the comments as "sequence-item". It is only when inserting an object into the list I cannot access it. Anybody has any ideas? ----------------------------------------------- index_html (dtml-method): ----------------------------------------------- <dtml-var standard_html_header> [<a href="add_comment">Ny kommentar</a>] <dtml-in getAllComments> <dtml-var author> <dtml-var comment fmt=structured-text> <center><hr height=1 noshade width=90%></center> </dtml-in> [<a href="add_comment">Ny kommentar</a>] <dtml-var standard_html_footer> ----------------------------------------------- class aComment: ' ' def __init__(self, comment, author): self.comment = comment self.author = author class mxm_guestbook_base: """ A base class for guestbook products """ def __init__(self): self.comments = [] def addComment(self, comment='', author='' , RESPONSE=None): "Adds a comment" self.comments.append(aComment(comment, author)) self._p_changed = 1 # Trigger persistence RESPONSE.redirect('index_html') def deleteAllComments(self, RESPONSE=None): "Deletes all comments" self.comments = [] RESPONSE.redirect('index_html') def deleteComment(self, id, RESPONSE=None): "Deletes a single comment" del(self.comments[id]) self._p_changed = 1 # Trigger persistence RESPONSE.redirect('index_html') def getAllComments(self): "returns a list of all comments" return self.comments ----------------------------------------------- Regards Max M Max M. W. Rasmussen, Denmark. New Media Director private: maxmcorp(a)worldonline.dk work: maxm(a)normik.dk ----------------------------------------------------- Specialization is for insects. - Robert A. Heinlein

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Re: [Zope] XMLRPC accessing Zope DTML/SQL methods
by Dieter Maurer 07 Nov '00

07 Nov '00

Mayers, Philip J writes: > I have an SQL query method backed by a persistent DB connection. I want to > call that method over XMLRPC remotely. How do I do that? Namely, how do I > pass named arguments to the SQL method? I have looked at XMLRPC some time ago, but I forgot most details: If XMLRPC supports keyword (i.e. named) parameters, then Zope will handle the parameter passing transparently for you. You must use the same keyword parameters your have defined in the ZSQL method. If XMLRPC supports only positional (i.e. unamend) parameters then you must use as a wrapper a method type that supports positional parameters (Python method/External method). > Also, I did some simple External Method examples, and acquisition doesn't > seem to work as advertised: This: > > def testf(self, REQUEST): > return self.index_html() > > Gives an error "standard_html_header not found". What's going on? When you call DTML objects yourself, you must pass the context explicitely: return self.index_html(self,REQUEST) Dieter

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Re: [Zope] Checking for ID's before creating ZClass
by Dieter Maurer 07 Nov '00

07 Nov '00

Ivan Cornell writes: > .... > How do I check for all existing id's in a folder? .... The method "objectIds" of a folder returns the list of ids in that folder. Dieter

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Re: [Zope] PythonMethod and accessing objects in the ZODB
by Dieter Maurer 07 Nov '00

07 Nov '00

Hannes Grund writes: > I'm using the PythonMethod product (latest Version) and Zope2.2.2. > The method lives inside a ZClass, which has an common instance > propertysheet. Also the method gets an 'self' as argument. > > Question 1: > How do i access the attributes stored within this propertysheet > within the method, > while self.title and self.id gives the desired results. > self.propertysheet.propertyname (among other experiments) > raises an error. There are API's for "PropertySheetManager" and "PropertySheets". Use them for access. > Question 2: > How do I access objects stored elsewhere in the ZODB, > for example > self.REQUEST....path_to_object.object That looks a bit strange. You can either access objects from self via acquisition: (e.g.) self.o.child or use the method "restricted_traverse" (--> API documentation). Dieter

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OO and ZClasses ?
by Douglas Daniel Del Frari 07 Nov '00

07 Nov '00

My main doubt using the Zope, is as to implement the OO concepts using the Zclasses. In the Z Classes, the attributes will be created in the " Property Sheets "? The operations will be created in the border " Methods "? The aggregation concept will be used using " Subobjects "? Question 2 is my main doubt. I am thankful all -- ----------------------------------------- Douglas Daniel Del Frari ----------------------------------------- Brazil, RS ----------------------------------------- mailto:gaucho@detec.unijui.tche.br http://labinf.detec.unijui.tche.br/~gaucho -----------------------------------------

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PythonMethod and accessing objects in the ZODB
by Hannes Grund 07 Nov '00

07 Nov '00

I'm using the PythonMethod product (latest Version) and Zope2.2.2. The method lives inside a ZClass, which has an common instance propertysheet. Also the method gets an 'self' as argument. Question 1: How do i access the attributes stored within this propertysheet within the method, while self.title and self.id gives the desired results. self.propertysheet.propertyname (among other experiments) raises an error. Question 2: How do I access objects stored elsewhere in the ZODB, for example self.REQUEST....path_to_object.object will raise an error...... Thanks in advance. Hannes.

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Re: [Zope] catalog DTML Document
by Dieter Maurer 07 Nov '00

07 Nov '00

Wolfgang Strobl writes: > I asked about how to perform this function (to spell it out again: > _adding_ a _DTML Document_) programmatically, i.e. via DTML, > of from Python code. ZCatalog.manage_catalogObjects(self, REQUEST, RESPONSE, URL1, urls=None) """ index all Zope objects that 'urls' point to """ You can use "ZopeFind" (--> ZQR) to "find" the objects and the "absolute_url" method to obtain the URL. Dieter

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Checking for ID's before creating ZClass
by Ivan Cornell 07 Nov '00

07 Nov '00

Hello from rainy England, In my constructor for a ZClass I want to auto generate an ID consisting of a name followed by a incrementing sequence (port0, port1, port2...). How do I check for all existing id's in a folder? I tried doing it in a PythonMethod (or whatever they are called now!), calling hasattr() but failed. Another possibilty would be to loop on a try..<createInObject>..raise until successful, but that doesn't seem very zopish. In the source code for createInObjectManager I can see it getting the folder, but can't figure how to acheive that directly, Ivan

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Re: XMLRPC accessing Zope DTML/SQL methods
by Red Pineseed 07 Nov '00

07 Nov '00

Since XML-RPC is already built into Zope, you do not need to work about that. You need however to write a java client to access your ZOPE method. There is information and a JAVA client on the xml-rpc site http://www.xmlrpc.com/. You can find enough info to start with. Philip > Message: 3 > From: "Mayers, Philip J" <p.mayers(a)ic.ac.uk> > To: "'zope(a)zope.org'" <zope(a)zope.org> > Subject: [Zope] XMLRPC accessing Zope DTML/SQL methods > Date: Tue, 7 Nov 2000 19:49:54 -0000 > charset="iso-8859-1" > > I'm planning on using Zope as some middleware to an SQL database backend. > Zope will implement the per-row ACL checking and such for the database > application, and there are two clients - a simple web-based Zope frontend, > and a larger standalone Java application. I'd like the Java app to > communicate with Zope using XMLRPC, so that I can re-use the middleware > portion, and take advantage of SSL'd HTTP, along with all the other bonuses > such as not trusting the client :o) > > But: I'm having problems that indicate I don't understand how External > Methods or the XMLRPC call support works. > > I have an SQL query method backed by a persistent DB connection. I want to > call that method over XMLRPC remotely. How do I do that? Namely, how do I > pass named arguments to the SQL method? > > Also, I did some simple External Method examples, and acquisition doesn't > seem to work as advertised: This: > > def testf(self, REQUEST): > return self.index_html() > > Gives an error "standard_html_header not found". What's going on? > > Regards, > Phil > > +----------------------------------+ > | Phil Mayers, Network Support | > | Centre for Computing Services | > | Imperial College | > +----------------------------------+

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