Re: [Zope-CMF] adding 'context' as an alias for 'object' in action expressions
Ross Patterson wrote at 2008-11-30 11:25 -0800: > ... >I'm not really up on the historical considerations, but I'm definitely >in favor of "context" and definitely opposed to "object". "object" is >too generic, the request is an object after all, everything is an >object. "context" reads more like what it is. +1 Of course, it should be consistent (as Yuppie noted), i.e. "context" everywhere (the same way in scripts, views, actions, templates, ). -- Dieter ___ Zope-CMF maillist - Zope-CMF@lists.zope.org http://mail.zope.org/mailman/listinfo/zope-cmf See https://bugs.launchpad.net/zope-cmf/ for bug reports and feature requests
Re: [Zope-CMF] adding 'context' as an alias for 'object' in action expressions
Tres Seaver <[EMAIL PROTECTED]> writes:
> yuppie wrote:
>> Hi!
>>
>>
>> Laurence Rowe wrote:
>>> yuppie wrote:
David Glick wrote:
> Does anyone have an objection to me adding 'context' as an alias for
> 'object' in the expression context that is built when executing CMF
> action expressions (in getExprContext in CMFCore/Expression.py)? This
> would remove one common source of minor confusion for beginning
> CMF/Plone developers (namely, having to use object in action expressions
> when you use context everywhere else).
-1
"There should be one-- and preferably only one --obvious way to do it."
'context' is deprecated for this kind of expressions, CMF uses 'object'
everywhere. Supporting 'object' *and* 'context' or switching from
'object' to 'context' will cause even more confusion.
Please see this thread
http://mail.zope.org/pipermail/zope-cmf/2005-March/021990.html>>> with
this result
http://mail.zope.org/pipermail/zope-cmf/2005-March/021999.html>> That
thread refers to 'content' rather than 'context'.
>>
>> The links to the thread were not meant as a contribution to the
>> discussion if 'context' is better than 'object'. My point is that this
>> was discussed before and that using 'object' was an explicit decision.
>> (And 'context' was also considered:
>> http://mail.zope.org/pipermail/zope-cmf/2005-March/021957.html )
>>
>>> Page templates have already made 'context' available as an alternative
>>> to 'here'. I don't see why 'object' should be treated any differently.
>>>
>>> "There should be one-- and preferably only one --obvious way to do it."
>>
>> The proposal was to *add* an alias. That means two ways to do it. It
>> makes the chance higher that you guess the right name, but it doesn't
>> make things more obvious.
>
> 'context' is the canonical name for the object through which a script or
> templated was acquired (its aq_parent, in fact); 'here' is a
> long-deprecated alias for 'context'. 'context' is like the 'self'
> binding of a normal Python method.
>
> Action expressions aren't scripts / templates, and don't have many of
> the stock names ('context', 'container', 'template', 'script',
> 'traverse_subpath', 'namespace', 'subpath', 'options', 'modules',
> 'root') which scripts and templates offer; instead, they offer names
> which are useful in writing action URLs (e.g., 'object_url',
> 'folder_url', 'portal', 'user_id', etc.) Their 'self' / 'context' would
> logically be the ActionInformation object, rather than the "target" for
> which the URL / condition is being computed.
Well, isn't a view instance object very much like an ActionInformation
object in this sense? In TALES expressions in a view, "context" doesn't
refer to the view object.
Ross
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Re: [Zope-CMF] adding 'context' as an alias for 'object' in action expressions
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yuppie wrote:
> Hi!
>
>
> Laurence Rowe wrote:
>> yuppie wrote:
>>> David Glick wrote:
Does anyone have an objection to me adding 'context' as an alias for
'object' in the expression context that is built when executing CMF
action expressions (in getExprContext in CMFCore/Expression.py)? This
would remove one common source of minor confusion for beginning
CMF/Plone developers (namely, having to use object in action expressions
when you use context everywhere else).
>>> -1
>>>
>>> "There should be one-- and preferably only one --obvious way to do it."
>>>
>>> 'context' is deprecated for this kind of expressions, CMF uses 'object'
>>> everywhere. Supporting 'object' *and* 'context' or switching from
>>> 'object' to 'context' will cause even more confusion.
>>>
>>> Please see this thread
>>> http://mail.zope.org/pipermail/zope-cmf/2005-March/021990.html
>>> with this result
>>> http://mail.zope.org/pipermail/zope-cmf/2005-March/021999.html
>> That thread refers to 'content' rather than 'context'.
>
> The links to the thread were not meant as a contribution to the
> discussion if 'context' is better than 'object'. My point is that this
> was discussed before and that using 'object' was an explicit decision.
> (And 'context' was also considered:
> http://mail.zope.org/pipermail/zope-cmf/2005-March/021957.html )
>
>> Page templates have already made 'context' available as an alternative
>> to 'here'. I don't see why 'object' should be treated any differently.
>>
>> "There should be one-- and preferably only one --obvious way to do it."
>
> The proposal was to *add* an alias. That means two ways to do it. It
> makes the chance higher that you guess the right name, but it doesn't
> make things more obvious.
'context' is the canonical name for the object through which a script or
templated was acquired (its aq_parent, in fact); 'here' is a
long-deprecated alias for 'context'. 'context' is like the 'self'
binding of a normal Python method.
Action expressions aren't scripts / templates, and don't have many of
the stock names ('context', 'container', 'template', 'script',
'traverse_subpath', 'namespace', 'subpath', 'options', 'modules',
'root') which scripts and templates offer; instead, they offer names
which are useful in writing action URLs (e.g., 'object_url',
'folder_url', 'portal', 'user_id', etc.) Their 'self' / 'context' would
logically be the ActionInformation object, rather than the "target" for
which the URL / condition is being computed.
> And the proposal was to change the expression context for actions. What
> about CachingPolicyManager and DCWorkflow?
Exactly.
- -1 to the change from me. Writing TALES expressions involves knowing
what the appropriate set of names are for the given usage.
Tres.
- --
===
Tres Seaver +1 540-429-0999 [EMAIL PROTECTED]
Palladion Software "Excellence by Design"http://palladion.com
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[Zope-CMF] CMF Tests: 6 OK
Summary of messages to the cmf-tests list. Period Sun Nov 30 12:00:00 2008 UTC to Mon Dec 1 12:00:00 2008 UTC. There were 6 messages: 6 from CMF Tests. Tests passed OK --- Subject: OK : CMF-2.1 Zope-2.10 Python-2.4.5 : Linux From: CMF Tests Date: Sun Nov 30 21:01:49 EST 2008 URL: http://mail.zope.org/pipermail/cmf-tests/2008-November/010477.html Subject: OK : CMF-2.1 Zope-2.11 Python-2.4.5 : Linux From: CMF Tests Date: Sun Nov 30 21:03:19 EST 2008 URL: http://mail.zope.org/pipermail/cmf-tests/2008-November/010478.html Subject: OK : CMF-trunk Zope-2.10 Python-2.4.5 : Linux From: CMF Tests Date: Sun Nov 30 21:04:50 EST 2008 URL: http://mail.zope.org/pipermail/cmf-tests/2008-November/010479.html Subject: OK : CMF-trunk Zope-2.11 Python-2.4.5 : Linux From: CMF Tests Date: Sun Nov 30 21:06:20 EST 2008 URL: http://mail.zope.org/pipermail/cmf-tests/2008-November/010480.html Subject: OK : CMF-trunk Zope-trunk Python-2.4.5 : Linux From: CMF Tests Date: Sun Nov 30 21:07:50 EST 2008 URL: http://mail.zope.org/pipermail/cmf-tests/2008-November/010481.html Subject: OK : CMF-trunk Zope-trunk Python-2.5.2 : Linux From: CMF Tests Date: Sun Nov 30 21:09:20 EST 2008 URL: http://mail.zope.org/pipermail/cmf-tests/2008-November/010482.html ___ Zope-CMF maillist - Zope-CMF@lists.zope.org http://mail.zope.org/mailman/listinfo/zope-cmf See https://bugs.launchpad.net/zope-cmf/ for bug reports and feature requests
Re: [Zope-CMF] adding 'context' as an alias for 'object' in action expressions
Hi! Laurence Rowe wrote: > yuppie wrote: >> David Glick wrote: >>> Does anyone have an objection to me adding 'context' as an alias for >>> 'object' in the expression context that is built when executing CMF >>> action expressions (in getExprContext in CMFCore/Expression.py)? This >>> would remove one common source of minor confusion for beginning >>> CMF/Plone developers (namely, having to use object in action expressions >>> when you use context everywhere else). >> -1 >> >> "There should be one-- and preferably only one --obvious way to do it." >> >> 'context' is deprecated for this kind of expressions, CMF uses 'object' >> everywhere. Supporting 'object' *and* 'context' or switching from >> 'object' to 'context' will cause even more confusion. >> >> Please see this thread >> http://mail.zope.org/pipermail/zope-cmf/2005-March/021990.html >> with this result >> http://mail.zope.org/pipermail/zope-cmf/2005-March/021999.html > > That thread refers to 'content' rather than 'context'. The links to the thread were not meant as a contribution to the discussion if 'context' is better than 'object'. My point is that this was discussed before and that using 'object' was an explicit decision. (And 'context' was also considered: http://mail.zope.org/pipermail/zope-cmf/2005-March/021957.html ) > Page templates have already made 'context' available as an alternative > to 'here'. I don't see why 'object' should be treated any differently. > > "There should be one-- and preferably only one --obvious way to do it." The proposal was to *add* an alias. That means two ways to do it. It makes the chance higher that you guess the right name, but it doesn't make things more obvious. And the proposal was to change the expression context for actions. What about CachingPolicyManager and DCWorkflow? Cheers, Yuppie ___ Zope-CMF maillist - Zope-CMF@lists.zope.org http://mail.zope.org/mailman/listinfo/zope-cmf See https://bugs.launchpad.net/zope-cmf/ for bug reports and feature requests
