Last modified: 2009-07-24 12:08:42 UTC

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Bug 826 - feature request: "empty template" as {{|parameter1|parameter2}} should be ignored
feature request: "empty template" as {{|parameter1|parameter2}} should be ign...
Status: RESOLVED INVALID
Product: MediaWiki
Classification: Unclassified
Templates (Other open bugs)
unspecified
PC Windows XP
: Normal enhancement with 1 vote (vote)
: ---
Assigned To: Nobody - You can work on this!
http://test.wikipedia.org/wiki/User:G...
:
Depends on:
Blocks: 839 2376
  Show dependency treegraph
 
Reported: 2004-11-05 03:25 UTC by lɛʁi לערי ריינהארט
Modified: 2009-07-24 12:08 UTC (History)
2 users (show)

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


Attachments

Description lɛʁi לערי ריינהארט 2004-11-05 03:25:42 UTC
Dear friends,
I try to build two versions of a list from 
http://test.wikipedia.org/wiki/User:Gangleri/tests/list_%
28template%29 .

One is for maintenance: 
http://test.wikipedia.org/wiki/User:Gangleri/tests/list_%
28maintenance%29
and the other should be an article 
http://test.wikipedia.org/wiki/User:Gangleri/tests/list .

There are two ways to do this:
a) an "empty template"  as {{|parameter1|parameter2}} should not 
be displayed / should be ignored; please note that no 
template_name is included
b) some if ($template_name == "") depending on implementation if 
($template_name IS NULL)

Regards
Comment 1 lɛʁi לערי ריינהארט 2004-11-05 11:51:04 UTC
A turnaround was found. See 
http://en.wikipedia.org/wiki/User_talk:Patrick#Janus_article .

- The "old" example is still available at 
http://test.wikipedia.org/wiki/User:Gangleri/tests/list_%28old_test_01%29.

- http://test.wikipedia.org/wiki/User:Gangleri/tests/list does what was 
intended to be done.

I would be happy if this would be a permanent feature and not a 
("possible") "site effect".

- If the behaviour of "an empty template" would be changed a new solition 
should be found.

----

A construct as
if ($template_name == "") [depending on implementation if 
($template_name IS NULL)]
would allow easy insertions (also headers, trailers, ...) to an article.

Regards Reinhardt
Comment 2 Rowan Collins [IMSoP] 2004-11-09 21:37:35 UTC
To clarify, as I understand it, the context is that "{{{{x}}|y|z}}" could be
used to pass a template as a parameter to another template, allowing things to
be formatted differently. But in order to omit the statement completely, you
can't just pass "|x= |", because that leaves you with {{|y|z}}, which is invalid
syntax.

The workaround is to use an existing but empty template as the parameter, so the
text becomes "{{blank_template|y|z}}", and (since Template:Blank_template
contains no text) is rendered blank. I see no reason why this behaviour will
ever change, as it is not a side-effect at all: the template is simply being
included; if it contained the single letter "A", the result would be the single
letter "A". Passing extra parameters to a template has no effect, and nor should it.
Comment 3 James Hess 2005-09-25 17:52:42 UTC
Why not make a Template:Empty or Template:Blank and get the effect of
non-inclusion of the template simply by including a template that would produce
no text?
Comment 4 lɛʁi לערי ריינהארט 2005-10-13 14:10:21 UTC
note on comment 2

> The workaround is to use an existing but empty template as the parameter, so the
> text becomes "{{blank_template|y|z}}", and (since Template:Blank_template
> contains no text) is rendered blank. ...

see also bug 2288 comment 3
bug 2288: Suggestion: links to empty pages should show up as uncreated
Comment 5 Happy-melon 2009-07-24 12:08:42 UTC
I don't see a need for a software solution to this: the use of a blank template as suggested in comment 2 is a completely stable way to achieve this effect.  The potential issue raised in commet 4 (bug 3843: treat links to blank pages as links to nonexistent pages) has been WONTFIXed, partly because of issues with syntax like this.  Also totally stale.

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