Re: [Zope-dev] Migrating from ZClasses to Python Products
Ender writes: Point taken. > Jason Spisak wrote: > > > > Ender writes: > > > > > Jason Spisak wrote: > > > > > > > > The only problem I am dealing with is size. > > > > What kind of a transaction will that be? > > > > Huge, no doubt. > > > > > > > > I would run out of space to buffer it. Does Zope do subtransactions now, > > > > or is that still just the ZCatalog? > > > > > > zope has done subtransactions for a while, i'm not sure if this predates > > > zcatalog or not ( i assume'd it does). > > > > > > just call get_transaction.commit(1) to save work. and call > > > get_tranaction.commit() when you're done. i'm in the process of writing > > > an advanced transaction how-to which will hopefully give some more > > > enlightenment on this process, but i've been busy with work so i don't > > > expect to have it public for another week. > > > > > > > Also, I am running on stock RH6.2 linux and to double my ZODB puts me near > > > > the 2 gig file limit. Not as much of a concern as a pain in my neck. Is > > > > it faster to modify my installation to allow > 2GB or create from > > > > xml/export? > > > > > > you could create the python product instances in a mounted db. > > > > > > > I looked into this. The webpage is very exclamitory about it's volitility, > > and yet Zope.org uses it. Worth a shot. > > do make a backup, i hosed something in my zodb using it. > > kapil Jason Spisak ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Migrating from ZClasses to Python Products
Ender writes: > Jason Spisak wrote: > > > > The only problem I am dealing with is size. > > What kind of a transaction will that be? > > Huge, no doubt. > > > > I would run out of space to buffer it. Does Zope do subtransactions now, > > or is that still just the ZCatalog? > > zope has done subtransactions for a while, i'm not sure if this predates > zcatalog or not ( i assume'd it does). > > just call get_transaction.commit(1) to save work. and call > get_tranaction.commit() when you're done. i'm in the process of writing > an advanced transaction how-to which will hopefully give some more > enlightenment on this process, but i've been busy with work so i don't > expect to have it public for another week. > > > Also, I am running on stock RH6.2 linux and to double my ZODB puts me near > > the 2 gig file limit. Not as much of a concern as a pain in my neck. Is > > it faster to modify my installation to allow > 2GB or create from > > xml/export? > > you could create the python product instances in a mounted db. > I looked into this. The webpage is very exclamitory about it's volitility, and yet Zope.org uses it. Worth a shot. Thanks Jason Spisak ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Migrating from ZClasses to Python Products
Toby Dickenson: Thanks for the advice. I have looked at that before, and having a hybrid ZClass/Python product seemed to place a lot of design considerations heavily in the python base class. I've looked _holdOntoYourButts before as well. Thanks again, > On Tue, 24 Oct 2000 20:16:30 GMT, "Jason Spisak" <[EMAIL PROTECTED]> > wrote: > > >I am trying to address shortcomings like not having a > >"dictionary" type property in Zope properties, etc. > > Aha! in that case you dont really need to convert from ZClass to > python class; you only need to modify your existing ZClass so that it > has an extra python base class. > > * No need to trawl through your database to convert each instance > > * No need to rewrite the bits that work well as a ZClass > > > You can do this using the method _setBasesHoldOnToYourButts defined in > ZClass.py, and you may be able to find some instructions in the list > archives. > > (Its often safer to create a special python base class for each new > ZClass, even if that class is empty, just in case) > > Toby Dickenson > [EMAIL PROTECTED] > > ___ > Zope-Dev maillist - [EMAIL PROTECTED] > http://lists.zope.org/mailman/listinfo/zope-dev > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope ) > Jason Spisak ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Migrating from ZClasses to Python Products
On Tue, 24 Oct 2000 20:16:30 GMT, "Jason Spisak" <[EMAIL PROTECTED]> wrote: >I am trying to address shortcomings like not having a >"dictionary" type property in Zope properties, etc. Aha! in that case you dont really need to convert from ZClass to python class; you only need to modify your existing ZClass so that it has an extra python base class. * No need to trawl through your database to convert each instance * No need to rewrite the bits that work well as a ZClass You can do this using the method _setBasesHoldOnToYourButts defined in ZClass.py, and you may be able to find some instructions in the list archives. (Its often safer to create a special python base class for each new ZClass, even if that class is empty, just in case) Toby Dickenson [EMAIL PROTECTED] ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Migrating from ZClasses to Python Products
Jason Spisak wrote: > > The only problem I am dealing with is size. > What kind of a transaction will that be? > Huge, no doubt. > > I would run out of space to buffer it. Does Zope do subtransactions now, > or is that still just the ZCatalog? zope has done subtransactions for a while, i'm not sure if this predates zcatalog or not ( i assume'd it does). just call get_transaction.commit(1) to save work. and call get_tranaction.commit() when you're done. i'm in the process of writing an advanced transaction how-to which will hopefully give some more enlightenment on this process, but i've been busy with work so i don't expect to have it public for another week. > Also, I am running on stock RH6.2 linux and to double my ZODB puts me near > the 2 gig file limit. Not as much of a concern as a pain in my neck. Is > it faster to modify my installation to allow > 2GB or create from > xml/export? you could create the python product instances in a mounted db. Kapil > Jason > > > > It should be Really Easy (TM) to write an external method that grabs > > the data from your zclasses, and then creates a new instance of your > > python object with the zclass data. It's just a big for loop. > > -Brett > > > > > "Jason" == Jason Spisak <[EMAIL PROTECTED]> writes: > > > > Jason> Shane: > > >> Jason Spisak wrote: > > >> > > > And now the big question... > > >> > > > > > >> > > > How do you migrate and existing application from ZClasses to Python > > >> > > > products? I've got about 50,000 objects. Can it be done or am I >stuck > > >> > > > with ZClasses? > > >> > > > > >> > > Andy McKay writes: > > >> > > > > >> > > Well the number of objects doesnt really matter, but migrating it from > > >> > > ZClass to Python - Ive never heard of that happening. It would be a cool > > >> > > project though. > > >> > > >> The hard part (which probably isn't very hard after all :-) ) is writing > > >> the product that performs the same function as the ZClass. Once that's > > >> done, a fifteen-line external method (that doesn't use any special > > >> voodoo) can convert all instances. > > >> > > >> Shane > > > > > > Jason> Perhaps what I should do is just get the data out, and create new >instances > > Jason> all via an external method. The migration isn't really a 1 for 1 > > Jason> situation. I am trying to address shortcomings like not having a > > Jason> "dictionary" type property in Zope properties, etc.. So the >implementation > > Jason> will be different anyway. I guess an export to XML gives me all the >data > > Jason> in the objects, right? Then I could use that as a map to construct new > > Jason> instances in a different implementation. > > > > > > Jason> Thanks for all the answers, > > > > Jason> Jason > > > > Jason> ___ > > Jason> Zope-Dev maillist - [EMAIL PROTECTED] > > Jason> http://lists.zope.org/mailman/listinfo/zope-dev > > Jason> ** No cross posts or HTML encoding! ** > > Jason> (Related lists - > > Jason> http://lists.zope.org/mailman/listinfo/zope-announce > > Jason> http://lists.zope.org/mailman/listinfo/zope ) > > > > ___ > Zope-Dev maillist - [EMAIL PROTECTED] > http://lists.zope.org/mailman/listinfo/zope-dev > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope ) ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Migrating from ZClasses to Python Products
Brett Carter writes: The only problem I am dealing with is size. What kind of a transaction will that be? Huge, no doubt. I would run out of space to buffer it. Does Zope do subtransactions now, or is that still just the ZCatalog? Also, I am running on stock RH6.2 linux and to double my ZODB puts me near the 2 gig file limit. Not as much of a concern as a pain in my neck. Is it faster to modify my installation to allow > 2GB or create from xml/export? Jason > > It should be Really Easy (TM) to write an external method that grabs > the data from your zclasses, and then creates a new instance of your > python object with the zclass data. It's just a big for loop. > -Brett > > > "Jason" == Jason Spisak <[EMAIL PROTECTED]> writes: > > Jason> Shane: > >> Jason Spisak wrote: > >> > > > And now the big question... > >> > > > > >> > > > How do you migrate and existing application from ZClasses to Python > >> > > > products? I've got about 50,000 objects. Can it be done or am I stuck > >> > > > with ZClasses? > >> > > > >> > > Andy McKay writes: > >> > > > >> > > Well the number of objects doesnt really matter, but migrating it from > >> > > ZClass to Python - Ive never heard of that happening. It would be a cool > >> > > project though. > >> > >> The hard part (which probably isn't very hard after all :-) ) is writing > >> the product that performs the same function as the ZClass. Once that's > >> done, a fifteen-line external method (that doesn't use any special > >> voodoo) can convert all instances. > >> > >> Shane > > > Jason> Perhaps what I should do is just get the data out, and create new >instances > Jason> all via an external method. The migration isn't really a 1 for 1 > Jason> situation. I am trying to address shortcomings like not having a > Jason> "dictionary" type property in Zope properties, etc.. So the implementation > Jason> will be different anyway. I guess an export to XML gives me all the data > Jason> in the objects, right? Then I could use that as a map to construct new > Jason> instances in a different implementation. > > > Jason> Thanks for all the answers, > > Jason> Jason > > Jason> ___ > Jason> Zope-Dev maillist - [EMAIL PROTECTED] > Jason> http://lists.zope.org/mailman/listinfo/zope-dev > Jason> ** No cross posts or HTML encoding! ** > Jason> (Related lists - > Jason> http://lists.zope.org/mailman/listinfo/zope-announce > Jason> http://lists.zope.org/mailman/listinfo/zope ) > ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Migrating from ZClasses to Python Products
Shane: > Jason Spisak wrote: > > > > And now the big question... > > > > > > > > How do you migrate and existing application from ZClasses to Python > > > > products? I've got about 50,000 objects. Can it be done or am I stuck > > > > with ZClasses? > > > > > > Andy McKay writes: > > > > > > Well the number of objects doesnt really matter, but migrating it from > > > ZClass to Python - Ive never heard of that happening. It would be a cool > > > project though. > > The hard part (which probably isn't very hard after all :-) ) is writing > the product that performs the same function as the ZClass. Once that's > done, a fifteen-line external method (that doesn't use any special > voodoo) can convert all instances. > > Shane Perhaps what I should do is just get the data out, and create new instances all via an external method. The migration isn't really a 1 for 1 situation. I am trying to address shortcomings like not having a "dictionary" type property in Zope properties, etc.. So the implementation will be different anyway. I guess an export to XML gives me all the data in the objects, right? Then I could use that as a map to construct new instances in a different implementation. Thanks for all the answers, Jason ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Migrating from ZClasses to Python Products
Jason Spisak wrote: > > > And now the big question... > > > > > > How do you migrate and existing application from ZClasses to Python > > > products? I've got about 50,000 objects. Can it be done or am I stuck > > > with ZClasses? > > > > Andy McKay writes: > > > > Well the number of objects doesnt really matter, but migrating it from > > ZClass to Python - Ive never heard of that happening. It would be a cool > > project though. The hard part (which probably isn't very hard after all :-) ) is writing the product that performs the same function as the ZClass. Once that's done, a fifteen-line external method (that doesn't use any special voodoo) can convert all instances. Shane ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Migrating from ZClasses to Python Products
Andy McKay writes: Cool Project... That means I'm screwed. :) > > And now the big question... > > > > How do you migrate and existing application from ZClasses to Python > > products? I've got about 50,000 objects. Can it be done or am I stuck > > with ZClasses? > > Well the number of objects doesnt really matter, but migrating it from > ZClass to Python - Ive never heard of that happening. It would be a cool > project though. > > > Hopefully, > > > > Jason Spisak > > CIO > > HireTechs.com > > 6151 West Century Boulevard > > Suite 900 > > Los Angeles, CA 90045 > > P. 310.665.3444 > > F. 310.665.3544 > > > > Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email > > address may not be added to any commercial mail list with out my > > permission. Violation of my privacy with advertising or SPAM will > > result in a suit for a MINIMUM of $500 damages/incident, $1500 for > > repeats. > > > > ___ > > Zope-Dev maillist - [EMAIL PROTECTED] > > http://lists.zope.org/mailman/listinfo/zope-dev > > ** No cross posts or HTML encoding! ** > > (Related lists - > > http://lists.zope.org/mailman/listinfo/zope-announce > > http://lists.zope.org/mailman/listinfo/zope ) > > > Jason Spisak CIO HireTechs.com 6151 West Century Boulevard Suite 900 Los Angeles, CA 90045 P. 310.665.3444 F. 310.665.3544 Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Migrating from ZClasses to Python Products
> And now the big question... > > How do you migrate and existing application from ZClasses to Python > products? I've got about 50,000 objects. Can it be done or am I stuck > with ZClasses? Well the number of objects doesnt really matter, but migrating it from ZClass to Python - Ive never heard of that happening. It would be a cool project though. > Hopefully, > > Jason Spisak > CIO > HireTechs.com > 6151 West Century Boulevard > Suite 900 > Los Angeles, CA 90045 > P. 310.665.3444 > F. 310.665.3544 > > Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email > address may not be added to any commercial mail list with out my > permission. Violation of my privacy with advertising or SPAM will > result in a suit for a MINIMUM of $500 damages/incident, $1500 for > repeats. > > ___ > Zope-Dev maillist - [EMAIL PROTECTED] > http://lists.zope.org/mailman/listinfo/zope-dev > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope ) > ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Migrating from ZClasses to Python Products
And now the big question... How do you migrate and existing application from ZClasses to Python products? I've got about 50,000 objects. Can it be done or am I stuck with ZClasses? Hopefully, Jason Spisak CIO HireTechs.com 6151 West Century Boulevard Suite 900 Los Angeles, CA 90045 P. 310.665.3444 F. 310.665.3544 Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
