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Re: SVN: Zope/trunk/lib/python/Testing/ZopeTestCase/ transaction.commit(1) is deprecated in favor of transaction.savepoint().

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fg at nuxeo

Nov 2, 2005, 2:56 PM

Post #1 of 5 (5932 views)
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Re: SVN: Zope/trunk/lib/python/Testing/ZopeTestCase/ transaction.commit(1) is deprecated in favor of transaction.savepoint().

Stefan H. Holek wrote:
> Log message for revision 39807:
> transaction.commit(1) is deprecated in favor of transaction.savepoint().

Actually, in favor of transaction.savepoint(optimistic=True).

Florent

> Changed:
> U Zope/trunk/lib/python/Testing/ZopeTestCase/doc/CHANGES.txt
> U Zope/trunk/lib/python/Testing/ZopeTestCase/testZODBCompat.py
>
> -=-
> Modified: Zope/trunk/lib/python/Testing/ZopeTestCase/doc/CHANGES.txt
> ===================================================================
> --- Zope/trunk/lib/python/Testing/ZopeTestCase/doc/CHANGES.txt 2005-11-01 12:55:46 UTC (rev 39806)
> +++ Zope/trunk/lib/python/Testing/ZopeTestCase/doc/CHANGES.txt 2005-11-01 13:00:43 UTC (rev 39807)
> @@ -1,4 +1,5 @@
> Unreleased
> +- transaction.commit(1) is deprecated in favor of transaction.savepoint().
> - Don't break if Python distros ship without profile support (Debian, Ubuntu).
> - Functional.publish() would hang if it got a request_method argument other
> than GET or HEAD while omitting the stdin argument.
>
> Modified: Zope/trunk/lib/python/Testing/ZopeTestCase/testZODBCompat.py
> ===================================================================
> --- Zope/trunk/lib/python/Testing/ZopeTestCase/testZODBCompat.py 2005-11-01 12:55:46 UTC (rev 39806)
> +++ Zope/trunk/lib/python/Testing/ZopeTestCase/testZODBCompat.py 2005-11-01 13:00:43 UTC (rev 39807)
> @@ -42,7 +42,7 @@
> self.folder.addDTMLMethod('doc', file='foo')
> # _p_oids are None until we commit a subtransaction
> self.assertEqual(self.folder._p_oid, None)
> - transaction.commit(1)
> + transaction.savepoint()
> self.failIfEqual(self.folder._p_oid, None)
>
> def testCutPaste(self):
> @@ -93,7 +93,7 @@
> self.folder.addDTMLMethod('doc', file='foo')
> # _p_oids are None until we commit a subtransaction
> self.assertEqual(self.folder._p_oid, None)
> - transaction.commit(1)
> + transaction.savepoint()
> self.failIfEqual(self.folder._p_oid, None)
>
> def testExport(self):
> @@ -315,7 +315,7 @@
> def testSubTransactionAbort(self):
> self.folder.foo = 1
> self.failUnless(hasattr(self.folder, 'foo'))
> - transaction.commit(1)
> + transaction.savepoint()
> transaction.abort()
> # This time the abort nukes the foo attribute...
> self.failIf(hasattr(self.folder, 'foo'))
> @@ -330,7 +330,7 @@
> def testSubTransactionAbortPersistent(self):
> self.folder._p_foo = 1
> self.failUnless(hasattr(self.folder, '_p_foo'))
> - transaction.commit(1)
> + transaction.savepoint()
> transaction.abort()
> # This time the abort nukes the _p_foo attribute...
> self.failIf(hasattr(self.folder, '_p_foo'))
> @@ -345,7 +345,7 @@
> def testSubTransactionAbortVolatile(self):
> self.folder._v_foo = 1
> self.failUnless(hasattr(self.folder, '_v_foo'))
> - transaction.commit(1)
> + transaction.savepoint()
> transaction.abort()
> # This time the abort nukes the _v_foo attribute...
> self.failIf(hasattr(self.folder, '_v_foo'))
>
> _______________________________________________
> Zope-Checkins maillist - Zope-Checkins [at] zope
> http://mail.zope.org/mailman/listinfo/zope-checkins
>

--
Florent Guillaume, Nuxeo (Paris, France) Director of R&D
+33 1 40 33 71 59 http://nuxeo.com fg [at] nuxeo
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tseaver at palladion

Nov 2, 2005, 4:10 PM

Post #2 of 5 (5666 views)
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Re: SVN: Zope/trunk/lib/python/Testing/ZopeTestCase/ transaction.commit(1) is deprecated in favor of transaction.savepoint(). [In reply to]

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Hash: SHA1

Stefan H. Holek wrote:
> Log message for revision 39807:
> transaction.commit(1) is deprecated in favor of transaction.savepoint().

This likely needs to be 'savepoint(optimistic=True)' (see collector
#1860 for rationale).

Tres.
- --
===================================================================
Tres Seaver +1 202-558-7113 tseaver [at] palladion
Palladion Software "Excellence by Design" http://palladion.com
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stefan at epy

Nov 3, 2005, 12:57 AM

Post #3 of 5 (5676 views)
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Re: Re: SVN: Zope/trunk/lib/python/Testing/ZopeTestCase/ transaction.commit(1) is deprecated in favor of transaction.savepoint(). [In reply to]

Perhaps. However, these tests specifically check interactions between
persistent objects, their attributes, and transaction commit/abort.
If things break there, I want to know about it.

Stefan

On 3. Nov 2005, at 01:10, Tres Seaver wrote:

> Stefan H. Holek wrote:
>> Log message for revision 39807:
>> transaction.commit(1) is deprecated in favor of
>> transaction.savepoint().
>
> This likely needs to be 'savepoint(optimistic=True)' (see collector
> #1860 for rationale).

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tim.peters at gmail

Nov 3, 2005, 7:22 AM

Post #4 of 5 (5662 views)
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Re: Re: SVN: Zope/trunk/lib/python/Testing/ZopeTestCase/ transaction.commit(1) is deprecated in favor of transaction.savepoint(). [In reply to]

>>> Log message for revision 39807:
>>> transaction.commit(1) is deprecated in favor of transaction.savepoint().

[Tres Seaver]
>> This likely needs to be 'savepoint(optimistic=True)' (see collector
>> #1860 for rationale).

[Stefan H. Holek]
> Perhaps. However, these tests specifically check interactions between
> persistent objects, their attributes, and transaction commit/abort.
> If things break there, I want to know about it.

The full deprecation msg spells it out in more detail:

subtransactions are deprecated; instead of transaction.commit(1), use
transaction.savepoint(optimistic=True) in contexts where a subtransaction
abort will never occur, or sp=transaction.savepoint() if later rollback is
possible and then sp.rollback() instead of transaction.abort(1)

If you're not testing *sub*transaction aborts (you only mention
"transaction abort" above, and that's not the same thing), then
there's no reason to avoid passing optimistic=True.

The only effect _not_ passing True has then is to raise a nuisance
exception if some data manager involved in the transaction doesn't
support the new ISavepoint interface. But if you're never going to do
a subtransaction abort, then there's no need for any data manager to
support ISavepoint. That's why optimistic= exists. If you _are_
going to do a subtransaction abort, then just calling
"transaction.savepoint()" is inadequate: you would need also to
assign the result of that to a variable, in order to call its
rollback) method later (at the point where you used to do
transaction.abort(1)).

So, either way, the current code is a bit off target. Best guess is
that you're not interested in *sub*transaction aborts here, so that
you do want to pass optimistic=True.
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stefan at epy

Nov 4, 2005, 2:26 AM

Post #5 of 5 (5654 views)
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Re: Re: SVN: Zope/trunk/lib/python/Testing/ZopeTestCase/ transaction.commit(1) is deprecated in favor of transaction.savepoint(). [In reply to]

Thank you for the clarification, Tim.

On 3. Nov 2005, at 16:22, Tim Peters wrote:

> The full deprecation msg spells it out in more detail:
>
> subtransactions are deprecated; instead of transaction.commit
> (1), use
> transaction.savepoint(optimistic=True) in contexts where a
> subtransaction
> abort will never occur, or sp=transaction.savepoint() if later
> rollback is
> possible and then sp.rollback() instead of transaction.abort(1)

Last time *I* saw it, it said "subtransactions are deprecated; use
transaction.savepoint() instead of transaction.commit(1)" ;-)

> So, either way, the current code is a bit off target. Best guess is
> that you're not interested in *sub*transaction aborts here, so that
> you do want to pass optimistic=True.

This is correct. I will pass True then.

Stefan

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