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| Maijin_ | Plop Hello all, I'm looking for some infos about ZODB, is it a good idea to use it for a directory?, Second question, I saw that it's just SQL. But can i perform all SQL operations ? | 02:25 |
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| Maijin_ | thanks ;-) | 02:25 |
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| nande | hey guys i'm looking about how to deal with broken objects, anyone with experience in that' | 03:32 |
| nande | ? | 03:32 |
| kosh | usually I fix the object | 03:37 |
| kosh | as soon as you fix the object enough that it loads you can deal with it more easily | 03:37 |
| nande | kosh: good to see/read you again. | 03:40 |
| nande | how do you "fix" the object, | 03:40 |
| nande | i just changed the location of the classes | 03:41 |
| kosh | uhoh | 03:41 |
| kosh | that is kind of a bitch to fix | 03:41 |
| kosh | pretty much broke one of the basic rules of pickles | 03:41 |
| nande | i'd like to do obj.__class__ = newmodule.Class | 03:41 |
| kosh | there is a way to do it but darned if I can remember the method since it is serious black magic | 03:42 |
| kosh | I think it has something to do with __setstate__ | 03:42 |
| kosh | you best bet is to ask on the zope or zope-dev email list | 03:42 |
| nande | mmm i'm not freind of mailing lists.. but thanks :) maybe i'll solve it by recreating the objects | 03:43 |
| kosh | if you have only moved the files you can symlink to the original location and have them work again | 03:43 |
| nande | on windows, cant. | 03:44 |
| kosh | in general though never rename or move these files once you have objects created from them | 03:44 |
| nande | yeap, but im kind of an arsehole, if my code doesnt look perfect i want to refactor it. | 03:45 |
| nande | btw, broken module is great :) i think i'll recreate the objects and copy base attributes | 03:45 |
| kosh | then you are going to have a lot of misery | 03:45 |
| nande | i am as for today i am. | 03:46 |
| kosh | it is just that if you keep doing this you will break things a lot | 03:46 |
| nande | i'm having a philosophical question about how to name my imports, and that's almost stupid. | 03:46 |
| nande | https://gist.github.com/704910 < kosh sorry dude, but, what do you think of this? | 03:48 |
| kosh | see what happens | 03:48 |
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| nande | sys.modules['db.models']=banta.db.models < easier to do actually | 04:05 |
| nande | >>> banta.db.DB.products.values()[0] | 04:08 |
| nande | <banta.db.models.Product object at 0x01F7FEB0> | 04:08 |
| nande | the thing now is to actually save it to zodb | 04:08 |
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| nande | hey kosh do you know why i cant use ZEO.ClientStorage.ClientStorage or transaction ==1.3 on mac? | 04:33 |
| kosh | not a clue I don't use macs | 04:34 |
| nande | http://apidoc.zope.org/++apidoc++/Book/zodb/persistentclass/show.html < i found about broken module, really cool.. i fixed the import with several codes, like faking the module path and creating a classFactory (which btw is cool) | 04:35 |
| nande | but how can i tell zodb to change the class of an object? | 04:35 |
| nande | i commit and nothing happens, next time is still broken | 04:36 |
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| nande | anyidea ? (i've set the _p_changed val) | 04:39 |
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| nande | is there a way to tell zodb to re-pickle everything? | 04:49 |
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| kosh | sorry I need to get to bed | 05:09 |
| kosh | just kind of fried from too many other things going on so not much help | 05:09 |
| kosh | chemical engineering classes are hard :) | 05:09 |
| nande | yeap they are | 05:14 |
| nande | rest well :) thanks | 05:14 |
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| nande | found the solution, it was pebkac by sleepness, i just lacked to put the _p_changed somewhere else | 05:33 |
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| jpic | hi all, i have no idea why transaction.commit() does not commit to the database file on my production server ... when it works locally ... any idea ? | 16:14 |
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| jpic | mcdonc_: /win 16 | 19:15 |
| jpic | sry | 19:15 |
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| jarr0dsz | hi everyone im trying to install plone on top of zope with an plone add-on and get a zope related error ConfigurationError: ('Invalid value for', 'for', "ImportError: Couldn't import zope.app.publication.interfaces, No module named publication.interfaces in Products.CMFPlone.interfaces.IPloneSiteRoot <-- is that zope related and fixable? | 20:31 |
| jarr0dsz | havent been able to find anything on this online for the last 20 minutes | 20:32 |
| betabug | jarr0dsz: ask in #plone, people who use zope without plone won't have that problem | 20:33 |
| betabug | I guess you might have a mis-match of the zope and plone versions, but only the plonies could help you there | 20:34 |
| jarr0dsz | okay thx betabug | 20:35 |
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| jpic | hi all, i don't understand when to use PersistentMapping and when to use OOBTree | 20:59 |
| LeoRochael | jpic: most of the time, OOBTree | 21:00 |
| LeoRochael | jpic: you'll want to use PersistentMapping when you *want* to have ConflictErrors if unrelated keys of the dictionary change | 21:01 |
| LeoRochael | jpic: and yes, sometimes you want that | 21:01 |
| LeoRochael | jpic: also, a PersistentMapping is always loaded from the ZODB at once, for all keys and values (although keys and values could be loaded as ghosts only, if they're persistent objects themselves). | 21:02 |
| LeoRochael | jpic: which could be bad or good depending on your application | 21:03 |
| LeoRochael | jpic: but if you frequently write to it, then it'll be horrible | 21:03 |
| * LeoRochael has nightmares of Localizer MessageCatalog objects, which store data on trees of PersistentMappings. Very fast for lookup, but constant source of ConflictErrors and a huge performance hit whenever one had to be reloaded from ZEO storage | 21:05 | |
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| betabug | I'd answer "use *always* OOBTrees" | 21:11 |
| betabug | if one day you achieve true master status to do differently to this advice, you will know it yourself | 21:12 |
| betabug | when I saw someone in my team use PersistentMapping, I flagged it as a bug | 21:13 |
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| kosh | I would recommmend always OOBTrees also | 21:30 |
| kosh | betabug: so how goes the apocalypse? | 21:31 |
| betabug | hey kosh! | 21:31 |
| betabug | dunno, spend the afternoon on the beach, eating and drinking... so the apocalypse is definitely "not now" | 21:32 |
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| kosh | yeah that does not sound like much of an apocalypse unless you where on a nude beach filled with overweight americans | 21:32 |
| kosh | so how have you been? | 21:33 |
| betabug | fine, a bit too much work, but ok after all | 21:35 |
| betabug | worked with Zope 3 and pyramid lately | 21:35 |
| kosh | I am on track to graduate in two more years just very very busy | 21:35 |
| kosh | chemical engineering + work is a lot | 21:35 |
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| betabug | I can imagine | 21:41 |
| betabug | and you're doing it for real, not just slacking in school | 21:41 |
| kosh | this semester I have thermodynamics, kinetics (heat transfer), physical chemistry and a engineering statistics and experimental design class | 21:41 |
| kosh | you can not slack through an engineering degree | 21:42 |
| kosh | you have to work your ass off just to pass | 21:42 |
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| jpic | wow, thanks for answering | 21:57 |
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| supton | jpic: one quick thing of note, BTrees keys/values/items methods return mutable iterators, which is like Python 3, but unlike default dict type in python 2… this can create real head-scratcher issues if you are not aware of it | 22:48 |
| supton | jpic: so lesson is, use (appropriate-to-data-type-of) BTrees, and always cast calls to keys/values/items to tuple, list, or set if you plan to mutate anything during iteration | 22:49 |
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| jpic | ahh good to know, thanks supton | 23:08 |
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