IRC log of #zope3-dev for Saturday, 2007-01-13

« Friday, 2007-01-12 Index Sunday, 2007-01-14 »
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WebMavenHmm. Nearly there... Looks like my adapter is causing an error during object creation, but I'm not really expecting it to be called then....00:42
WebMavenThe adapter won't work until the transaction creating the adapted object is complete. Does anyone have a suggestion as to how to fix this?00:43
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WebMavenman this is hard.00:58
WebMavenhere is the problem:00:58
WebMavenMy relational adapter for IZopeDublinCore only works once the rows are added to the db00:59
WebMavenwhich doesn't happen until the zope transaction commits.00:59
WebMaven*before* that happens, the adapter gets applied by (as far as I can tell) the security machinery.01:00
WebMavenand it fails, because the db is retirning an empty set for the query.01:02
WebMavenHmm. OK, it looks like it's not the security machinery, but something subscribing to the creation event (maybe)...01:05
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WebMavenAny ideas on how to fix this? I can provide a traceback and show my source code.01:05
WebMavenI'm really stuck here, can anyone take a look at this?01:09
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WebMavenCan I disable an adapter during object creation?01:18
ccombI don't understand01:18
ccombyou use an adapter on something that does not exist ?01:18
WebMavenUmm, no.01:18
WebMavenOK, so I am trying to get ZAlchemy working for a simple content object. This worked.01:19
WebMavenI am trying to adapt the content object to IZopeDublinCore with an adapter the gets it's info also from the rdb.01:20
WebMaventhis also works.01:20
WebMavenit does this by querying the db based on an id attribute in the object.01:20
WebMavenHowever!01:20
WebMavenduring object creation, the zope transaction has not completed, and a query to the db will give an empty result.01:21
WebMavenUnfortunetely, the object *is* being adapted to IZopeDublinCore during the transaction.01:22
WebMavenso the query gives an empty set, and the adapter fails (result = query[0]), aborting the Zope transaction.01:23
WebMavenSo, I need to adapt the object only *after* it has been created.01:24
ccombI've never used zalchemy yet, I fear I won't be able to help on this, maybe you should make a pause or go to sleep (depending on your local time) because sometimes we spend several hours on one point, and on the morning we find in ten minutes...01:24
WebMavenit's not really a ZAlchemy problem, but a general one (I believe) with rdb based adapters.01:26
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ccombI'm still stuck on the zodb01:27
WebMavenif the adapter is pulling info from the rdb based on a primary key, and the adaptation is called during the object's instantiation before the transaction comits and the primary key has been written to the db, the exception or error can cause the whole zope transaction to fail.01:29
WebMavenMaybe I can catch the error.01:31
WebMavenbut I'm pretty sure that will only push the problem around.01:31
WebMavenlet's see...01:31
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WebMavenHmm.01:38
WebMavenDang. Fixed with a try/except.01:39
WebMavenCool.01:39
WebMavenWow. I think that's the last bug.01:39
WebMavenI have a working (if not complete) relational adapter for IZopeDublinCore!01:40
WebMavenI rock!01:40
WebMavenWoo!01:42
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ccombwas it just to learn or you have a project that uses it ?01:45
WebMavenMostly the latter, because although I do need dublin core metadata for project, I could have simply duplicated the fields in various tables instead of using a more general purpose adapter.01:50
WebMavenThe rdb schema was devised with this particular pattern in mind.01:50
WebMavenAnd then I got stubborn.01:51
WebMaven;-)01:51
WebMavenWhy do you ask?01:52
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WebMavenHmm. Perhaps I spoke just a little too soon.02:00
WebMavenI can't traverse to the 'title' attribute:02:00
WebMavenTraversalError: (<rogue.za_example_4.message.HelloWorldMessage object at 0xb6ae166c>, 'title')02:01
WebMavenit's editable, and it's being saved in the rdb, but I can't render it on the page.02:01
WebMavenHmm. I'm probably doing something not-quite right in the adapter with the properties that isn't satisfying the DC contract.02:02
WebMavenHmm. This *looks* ok:02:03
WebMaven    def setTitle(self, title):02:03
WebMaven        self.result.title = title02:03
WebMaven02:03
WebMaven    title = property(getTitle, setTitle, doc="RelationalDC title")02:03
WebMavenerr missed copying the get:02:04
WebMaven    def getTitle(self):02:04
WebMaven        return self.result.title02:04
WebMaven02:04
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d2manyone knows what happened to 'mount-point' in the zope.conf for mounting a zeoclient into a certain folder ?10:17
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