IRC log of #zope3-dev for Tuesday, 2008-01-22

« Monday, 2008-01-21 Index Wednesday, 2008-01-23 »
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malthein Grok, is there an event we can listen to that will be fired once the Application object is set up entirely (in particular the local utilities set up by the grokkers)?01:01
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malthe_hmm someone closed my computer grr01:05
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pyqwerafd_: In case you are interested in my yesterday's vocabulary problem: There were some problems in my test setup, now it works.14:04
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afd_pyqwer: that I knew... what sort of problems did you have with your test setup?14:04
pyqwerafd_: I don't know exactly, yesterday I copied some of the <include package...> directives from another project, now I simply do a <include package="zope.app.zcmlfiles" />14:06
afd_cool14:06
pyqwerWell, and <include package="zope.app.zcmlfiles" file="ftesting.zcml" /> and some other packages that are specific to my project.14:06
pyqwerBut the majority zope stuff, e.g. zope.component etc. is included via zope.app.zcmlfiles, it seems.14:07
afd_yes14:07
pyqwerBtw, do you know of a simple way to check what permissions a principal has on an object?14:07
pyqwerI declared some permissions, roles and principals and now I'd like to test if security really works.14:08
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afd_look at zope.securitypolicy.interfaces.IPrincipalPermissionMap14:08
afd_I think you can do IPrincipalPermissionMap(context)14:09
pyqwerHmmm, ok, no, that's not really what I need: I'd like to find out if a principal can acutally write/read an object/view14:10
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pyqwerI found canAccess/canWrite from zope.security, but for that I have to set up an interaction, which is quite complicated.14:11
pyqwerMoreover, it seems not to work here (everything seems to be allowed here).14:11
afd_you might do it from functional tests, where you can login with different users and try the edit views14:12
pyqwerSo, you mean, call some magic login function with appropriate data, which will then set up the interaction and try to access the edit view in my doctest?14:13
afd_you know you can do something like  >>> browser.addHeader('Authorization', 'Basic user:pwd')14:14
afd_what I'm saying if you can have your principals created in the user source and login with them and test those views14:14
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afd_if you don't want to setup interfaction for unit testing14:15
afd_interfaction = interaction14:15
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pyqwerOk, good idea.14:15
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nerdalerthello, I've run into a little problem where I'm trying to move an object from one zodb to another, like a backup.  is there anyone here that can offer some advice?15:43
pyqwerFor zope2, there's some export facility, I think.15:43
bigkevmcdsame version of zope?15:43
bigkevmcdand they pretty much have to be identical15:43
pyqwerFor ZODB only, well, perhaps you have success with serializing the object (e.g. with pickle()) and write it to a file.15:44
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pyqwernerdalert: But, well, another idea: Why not simply open both ZODB databases and copy the object?15:46
nerdalertI'm using zope 3, and I've run into problems with using regular pickle15:46
nerdalertpyqwer: I tried that actually, and what gets copied is a reference15:46
pyqwernerdalert: What about copy.deepcopy()?15:47
nerdalertI tried that also.  I think python's copy module wants to copy the _p_* attributes15:47
mgedminpyqwer: will that work?15:47
mgedminI once copied an object in Zope 2 from /temp_folder to /15:47
mgedminand got a broken object as a result15:48
pyqwermgedmin: No clue, that was just a suggestion...15:48
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pyqwerBut, AFAIK, it's possible to define a __copy__ method, which can be used to clone the object.15:48
nerdalertwhere I'm at now, I'm wondering if there's a built-in way to do what I want, or if I need to implement __copy__/__deepcopy__ for all my objects15:48
pyqwerSo, a copy(myobj) will do it.15:48
nerdalertyeah, I'm about to go that route, but I think I need to override __copy__ for all my objs15:49
pyqwernerdalert: maybe there's some inheritance trick, or mixin class possible?15:50
nerdalertI don't know if there is an inheritance trick15:50
pyqwerI mean, some super-class that implements a version for __copy__ that will work for all your objects.15:51
nerdalertI was thinking about doing it with adapters, actually15:51
nerdalertmake an ICopy adapter for things I want to copy15:51
pyqwerHmmm, then you'd also have to implement some copy function for each method.15:51
nerdalertbut I think in general, it's the concrete classes that will best know how to copy themselves15:51
pyqwerI think so, too.15:52
nerdalertI mean, say I implement some __copy__ that works on all lists15:53
nerdalertit would have to know about the subclasses of list to know whether to build a linked-list or array-list etc...15:53
afd_what about fssync? Not that I've ever used it, but my impression is that it fits the requirements15:53
nerdalerthaven't heard of fssync15:53
nerdalertI'm not trying to copy an entire filestorage though15:54
mgedminit was never completed15:54
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nerdalertjust one object graph contained within a storage15:54
mgedminI think you'll end up doing an application-specific data serialization format15:54
afd_http://svn.zope.org/zope.app.fssync/trunk/README.txt?rev=79751&view=markup15:54
pyqwerI'm merely thinking of implementing a __copy__ function that merely omits the _p_* attributes.15:54
mgedminone view to export everything to, say, XML; another view to parse that XML and create objects15:54
nerdalertmgedmin: yeah, I wanted to avoid that if possible, but signs are indeed pointing to yes15:55
pyqwer*Maybe* twisted's perspective broker could help.15:55
pyqwerBut I don't know how/if this integrates with zope3.15:56
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mgedminobject databases have some downsides...15:56
pyqwermgedmin: Well, yes, but actually, I'm wondering that no one thought about this.15:56
pyqwerCopying objects is not uncommon.15:56
nerdalertpyqwer: exactly!15:57
mgedminthere is copy & paste in zmi15:57
mgedminit's implemented in a rather interesting way15:57
nerdalertthat's why I'm here before I go on a __copy__ implementation binge =P15:57
mgedminthere's also zc.copy, I think15:57
mgedminthe ZMI object copier uses pickles with a custom hook that deeply copies objects contained within the starting object in the __parent__ hierarchy, and keeps links to objects outside it15:58
nerdalertafd_: fssync looks interesting.  I'll have to read up on it some more15:58
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nerdalertmgedmin: that may be a problem too, since eventually the __parent__ relationship points to something that I wouldn't want copied15:59
nerdalertmgedmin: I want to start a copy and work my way down, not up16:00
mgedminyes16:00
mgedminzope 2 import/export works that way, afaiu16:00
benjipyqwer: I think zc.copy is what you want16:00
mgedminI think it's nerdalert that wants it, not pyqwer16:01
benjihim then ;)16:01
nerdalertbenji: yeah, it's me =P16:01
benjiheh16:01
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TheuniJ1m: I'm still trying to get the clientcache issue reproducable.16:30
Theuni(To answer your question from a while ago)16:30
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TheuniI found two hotspots that keep coming back: a) eviction of non-current objects with more than one old versions existing b) the filecache's filemap getting inconsistent16:31
Theunijust to let you know ...16:32
* Theuni heads off to get some coffee16:32
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pyqwerHmmm, I set up an interaction, assigned a participation with a principal to it, set it to thread_local and try to check permissions with canAccess.17:10
pyqwerHowever, the result is always "True", which is bad. Any clues why?17:11
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SteveATheuni: ping17:44
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J1mTheuni, wha?17:46
TheuniSteveA: semi pong17:56
TheuniSteveA: i'll be afk for ~30 minutes17:56
SteveATheuni: ok17:57
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TheuniSteveA: pong18:40
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