Last modified: 2010-04-09 00:43:50 UTC

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Bug 5453 - Transcluded substitutions are treated as literals (neither transcluded nor substituted)
Transcluded substitutions are treated as literals (neither transcluded nor su...
Status: RESOLVED FIXED
Product: MediaWiki
Classification: Unclassified
Templates (Other open bugs)
unspecified
All All
: Normal normal with 3 votes (vote)
: ---
Assigned To: Nobody - You can work on this!
http://en.wikipedia.org/wiki/Template...
: patch
: 8675 (view as bug list)
Depends on: 16714 22297
Blocks:
  Show dependency treegraph
 
Reported: 2006-04-04 19:57 UTC by Kyle Barbour
Modified: 2010-04-09 00:43 UTC (History)
5 users (show)

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---


Attachments
A proposed patch (1.24 KB, patch)
2010-01-27 02:28 UTC, Conrad Irwin
Details

Description Kyle Barbour 2006-04-04 19:57:19 UTC
When using the markup {{<includeonly>subst:</includeonly>PAGENAME}} (or any
other magic word. I've tested several and had the same results with all of 'em)
on a page, PAGENAME displays the pagename properly when viewing that page. When
that page is substed into another page, it displays properly as well. However,
when that page is displayed using a template tag (i.e. {{Template:Welcome}}),
what is shown on that page is "{{subst:PAGENAME}}" (for example, here's a
template with said <includeonly> tags: [[en:User:Blackcap/Welcome]], and here's
a page with template tags linking to that page:
[[en:User:Kusma/Sandbox#Welcome.2C_.7B.7Bsubst:PAGENAME.7D.7D.21]]). I reckon
that what should be shown  is simply what {{PAGENAME}} would normally show;
thus, the pagename.
Comment 1 Kyle Barbour 2006-04-04 20:03:24 UTC
Clarification on why I used [[en:Template:Welcome]] as the URL: the bug was
found there while trying to find a way to either subst or not subst PAGENAME on
that template. Discussion: [[en:Template talk:Welcome#PAGENAME issue]].
Comment 2 Brion Vibber 2006-04-04 20:10:18 UTC
You're breaking up the markup with other markup; that tends not to work.
Comment 3 Kyle Barbour 2006-04-04 20:23:21 UTC
Yet, the additional markup doesn't break when the template is substed. Is that
to be expected?

If it's the addition markup causing the problem, another editor
([[en:User:Kusma]]) suggested that there be an addition of <substonly> and
<nosubst> tags, with the effect that things inside them would only be shown when
the page is substed or displayed, respectively. Thus, one could deal with the
problem by using the markup "<nosubst>{{PAGENAME}}</nosubst>
<substonly>{{subst:PAGENAME}}</substonly>."
Comment 4 Melancholie 2006-04-08 19:18:30 UTC
If it won't work with <includeonly>, will it work like it was requested in bug 4484?
If yes, this bug is a duplicate of bug 4484.
Comment 5 Kyle Barbour 2006-04-09 06:58:27 UTC
It might be. If what I'm referring to is a bug with <includeonly>, then no. If
<includeonly> is intended to operate in the way it does, than yes, it would be a
duplicate, and should be marked as such.
Comment 6 Aryeh Gregor (not reading bugmail, please e-mail directly) 2006-07-27 03:22:52 UTC
The bug (if it can be called a bug, strictly speaking) is that transcluding a
substitution is impossible and results in the substitution being treated as a
literal.  If you transclude "{{subst:foo}}", it can't be substituted into the
transclusion, obviously, which is why I'm not sure this is really a bug. 
Desired behavior is that it be transcluded, with the "subst:" ignored.

On the other hand, until bug 4484 and/or bug 2003 are fixed, this behavior is
important to force people to subst; a number of templates on enwiki are using
this to avoid people accidentally editing a transcluded talk-page template like
[[Template:Image source]] by clicking the section edit link, and IMO it would be
unwise to take that ability away without replacing it.
Comment 7 Splarka 2009-06-24 00:35:45 UTC
*** Bug 8675 has been marked as a duplicate of this bug. ***
Comment 8 Conrad Irwin 2010-01-27 02:28:54 UTC
Created attachment 7023 [details]
A proposed patch

The patch attached adds new syntax

{{<includeonly>subst:subst:</includeonly>Template}}

now acts exactly like 

{{<includeonly>subst:</includeonly>Template}}

always should have. I.e. it expands the template even when it is being included in a template that does not get subst:d.

In other respects

{{subst:subst:Template}}

acts exactly like 

{{subst:Template}}

The alternative way to fix this would be to add a new magic word, this would, in my opinion, be less easy for editors to remember. (That said we don't seem to care much about the usability of template-wikitext).
Comment 9 Conrad Irwin 2010-02-10 14:38:40 UTC
Since safesubst: was added in r61710. You will be able to use "safesubst:" instead of "subst:" in templates that require transcluded substitution to work, while still being able to use subst: for cases where the template wants to know if it has been subst:d.

http://en.wikipedia.org/wiki/Help:Substitution#safesubst:
Comment 11 Conrad Irwin 2010-04-09 00:43:50 UTC
Sorry, this particular change was not reverted by Tim, and is in 1.16beta.

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