November 1999 - Zope-Dev

Is _getOb() best way to grab a ref to a particular object?
by Andrew Wilcox 21 Nov '99

21 Nov '99

I need to grab a reference to a particular object in the ZODB from an external method, bypassing acquisition. Is this the right way to do it: def test(self, REQUEST=None): """doc string""" myobj = REQUEST.PARENTS[-1].aTopLevelFolder.anotherFolder._getOb('id_of_myobj') ...do stuff with myobj: myobj.title, myobj.index_html, myobj.property = 123 ...

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Creating Python base class for ZClasses
by Itamar Shtull-Trauring 21 Nov '99

21 Nov '99

I want to create a Python base class that inherits from the ObjectManager ZClass, since I want to have it automatically add the "Subobjects" tab in the ZClass management screen. Inheriting from OFS.ObjectManager.ObjectManager does not do this - I need to inherit from ZClasses.ObjectManager.ObjectManager. Would the appropiate way to do this be: class MyObjectManager(ZClasses.ObjectManager.ObjectManager): " .... " class ZMyObjectManager: """Mix-in for Object Management """ _zclass_=myObjectManager propertysheets=ZClasses.ObjectManager.ZObjectManagerPropertySheets() manage_options=( {'label': 'Subobjects', 'action' :'propertysheets/subobjects/manage'}, ) and then register ZMyObjectManager as a base class in __init__.py? Or should I do: class MyObjectManager(ZClasses.ObjectManager.ObjectManager): propertysheets=ZClasses.ObjectManager.ZObjectManagerPropertySheets() manage_options=( {'label': 'Subobjects', 'action' :'propertysheets/subobjects/manage'}, ) and register that as the base class? -- Itamar S.T. itamars(a)ibm.net

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draft how-to on local roles and the owner role.
by Anthony Baxter 21 Nov '99

21 Nov '99

I've just started a how-to on local roles and the owner role at http://www.zope.org/Members/anthony/owner_role/ The information is just collected from some posts by Brian Lloyd to the zope list, but hopefully will be easier to find as a how-to. Comments to me - I'll have another bash at it tomorrow, then add it to the catalog. Anthony

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Re: [Zope-dev] A few modifications to the tree tag
by Anthony Baxter 21 Nov '99

21 Nov '99

>>> Martijn Pieters wrote > [altering tree tags to allow different images] > > They are in the Collector...: > http://classic.zope.org:8080/Collector/374/view > and > http://classic.zope.org:8080/Collector/375/view blah. can't access the collector items. Was there a reason given to the previous request to allow general folks access to collector items that are pending? >From using mozilla and bugzilla, having publically accessible bug reports is a good, good, thing. It allows you to track changes and fixes much more easily...

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Re: [Zope-dev] User authentication using UserDB
by Anthony Baxter 21 Nov '99

21 Nov '99

>>> Stephan Richter wrote > But now how can I use this login and the Zope security features to actually > shut off sections of my site. Basically I want to make certain directories > only available to the logged in user. Note: I also created a new role. All > users that are authenticated and have this role can see a certain directory. > Is it right that I have to use the "Security" tab? What do I have to do? Yep - you should go to the security tab for the folder(s) that are accessible only to auth'd users, and for each of 'view', 'access contents' and whatever else you want to shutoff: uncheck the 'acquire permission settings' box make sure 'anonymous' doesn't have the box checked check the box for your new role Anthony

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Re: [Zope-dev] SQLSession help needed!
by Anthony Baxter 21 Nov '99

21 Nov '99

>>> "Jeff Rush" wrote > >It sounds like the PostgreSQL DA is a little bad in it's handling of > >errors - the Oracle, Sybase and Gadfly DAs all produce a decent error > >message. > > Perhaps, but Zope should not crash/become incommunicative when > a DA goes wierd. well yes, but then, DCOracle shouldn't make Zope crash when you give it an incorrect connection string, either :) Anthony

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User authentication using UserDB
by Stephan Richter 21 Nov '99

21 Nov '99

hello everyone, I just learned how to use UserDB to have a login on my page. Okay, I got to the point where I can login and the AUTHENTICATED_USER is set to my new username. But now how can I use this login and the Zope security features to actually shut off sections of my site. Basically I want to make certain directories only available to the logged in user. Note: I also created a new role. All users that are authenticated and have this role can see a certain directory. Is it right that I have to use the "Security" tab? What do I have to do? regards, stephan -- Stephan Richter iXL - Software Designer and Engineer CBU - Physics, Computer Science and Chemistry Student

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Re: [Zope-dev] SQLSession help needed!
by Jeff Rush 21 Nov '99

21 Nov '99

On Sun, 21 Nov 1999 16:08:58 +1100, Anthony Baxter wrote: >>>> Clayton Miller wrote >> Here is the error I am getting: >> >> Temporarily Unavailable >> The resource you requested is temporarily unavailable - >> >> please try again later. >> >> (116) unable to connect, fd=5 > >This isn't an SQLSession error. I've never seen this at all. It comes from the pcgi-wrapper program. It means he could not establish a connection to ZServer, and contains no further information. The fd=5 part is just the handle of the sock that pcgi-wrapper was using and is of no use to you. >> This is the type of error I have received plenty of times when the SQL >> statement was incorrect somehow. Just how do you debug this error? I >> looked at standard_error_html and I do not see this error text. How do >> you find out which object /line is causing the problem? Interesting... you see this on any SQL statement error? Re how to debug, the only way is to consult any logfiles and/or core files Zope produces. >It sounds like the PostgreSQL DA is a little bad in it's handling of >errors - the Oracle, Sybase and Gadfly DAs all produce a decent error >message. Perhaps, but Zope should not crash/become incommunicative when a DA goes wierd. __________________________________________________ Jeff Rush <jrush(a)taupro.com> Tau Productions Inc. Linux/Python/Zope Consultant http://www.taupro.com

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Re: [Zope-dev] SQLSession help needed!
by Anthony Baxter 21 Nov '99

21 Nov '99

>>> Clayton Miller wrote > I have posted this message on the Zope maillist but I did not get a good > answer. So I decided maybe some real Geeks hang out here instead. I am > having trouble getting the SESSION.set(...) to work. > Here is the code I am using. > > <dtml-comment> > -----code starts here -------- > ZipCode = <dtml-var ZipCode> > Distance = <dtml-var Distance> > <dtml-var "SESSION.set('myZipCode', ZipCode)"> > <dtml-var "SESSION.set('myDistance', Distance)"> > <frameset cols="30%,70%"> > <frame src="<dtml-var Root>/Menu" name="Menu"> > <frame src="<dtml-var Root>/Main" name="Main"> > </frameset> > -----code ends here ------- > </dtml-comment> > > Here is the error I am getting: > ! > > Temporarily Unavailable > > The resource you requested is temporarily unavailable - > > please try again later. > > (116) unable to connect, fd=5 This isn't an SQLSession error. I've never seen this at all. Hm - I wonder if it's breaking the postgres adaptor in some way... Can you do a 'test' of the various SQL methods inside the SQLSession? Do they work? Can anyone who uses Postgres confirm whether or not strings in an insert can contain newlines? e.g.: will the following work? create table foobar ( ch varchar(200) ) insert into foobar ( ch ) values ( 'this is a long string' ) If not, it's possible that this is the problem. Gadfly has a similar issue. I have an idea on how to fix this, I'll whack it in the code and upload a new version shortly. > This is the type of error I have received plenty of times when the SQL > statement was incorrect somehow. Just how do you debug this error? I > looked at standard_error_html and I do not see this error text. How do > you find out which object /line is causing the problem? It sounds like the PostgreSQL DA is a little bad in it's handling of errors - the Oracle, Sybase and Gadfly DAs all produce a decent error message. Anthony -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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Re: [Zope-dev] A few modifications to the tree tag
by Anthony Baxter 21 Nov '99

21 Nov '99

>>> Hannu Krosing wrote > BTW, Is SQLSession usable on Gadfly (and is gadfly thread-safe) ? > Is gadfly a good place for storing sessions ? In _theory_, yes. In practice, gadfly's parser barfs on strings with embedded newlines. Since by default Sessions store the data as base64, this breaks if the objects encode to more than a line. I plan to allow a choice of encoding as base64 or using zopes var:type format - I'd hoped to get this into 0.2, but it's not working yet, so it will be in 0.3. > > The second point, would a patch to allow a 'prefix' for the tree-[ecs] > > options be a useful thing? That way you can have multiple trees on the > > same page. So if prefix=foobar, the cookies/form values would be of the > > type 'foobartree-e' &c. > Thats exactly what I have been thinking. cool - I'll send a patch tomorrow. > > Third point: is it worth allowing the tree icons +/- to be overridden? > > I thought I remembered someone had done this, but I can't remember it > > for sure, and I can't find it in my zope archives... MartijnP's response (he did it, but can't find it now) suggests that I need to implement it myself. Since I need it for a system that's going live in the next week or so, expect a patch in the not too distant future. :) -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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