SID-00018: Variable Handling

Status:	Answered	TWiki version:	4.2.3	Perl version:	5.10.0
Category:	CategoryPlugins	Server OS:	Windows	Last update:	16 years ago

Hallo,

how can i access to a VAR in the view script when it was set in a topic?

I have set it in the topic text like this:

• • #set VARNAME = on

I have tried it with TWiki::Prefs::getPreferencesValue( "VARNAME" ) and TWiki::Func::getPreferencesValue( "VARNAME" ) but i m getting an error: "Undefined Subroutine ...".

Can someone explain me please what i have to do, to access to a self created VAR?

Thx alot. Thomas

-- ThomasMueller2009 - 08 Jan 2009

Discussion and Answer

Not sure why you get the "Undefined Subroutine ..." error. Have you initialized your plugin properly?

Use only official TWiki::Func functions, not internal ones like TWiki::Prefs.

TWiki::Func::getPreferencesValue can retrieve the value of preferences setting. Remember that pref settings can be overloaded (2 x site level -> web level -> page level), e.g. you get the end result of the pref setting. Watch out for the $NO_PREFS_IN_TOPIC plugin variable. See docs in TWikiFuncDotPm

-- PeterThoeny - 09 Jan 2009

Hallo,

sorry for delay ...

I added now "require Twiki::Func" and the error "Undefined Subroutine..." is gone. But I m getting now the error "Can't call method getPreferencesValue on undefined value". Do I have to register my created VARNAME somewhere?

I have set the VARNAME in a Topic and want to access the value in a modified view-Script. Something like the Accesspermission Routine.

-- ThomasMueller2009 - 16 Jan 2009

Is this a standalone script? Make sure to initialize it properly before you call any TWiki::Func function. Look at the twiki/tools/mailnotify or twiki/bin/statitics scripts for inspiration.

-- PeterThoeny - 16 Jan 2009

Sorry but both script doesn't helped me to get an idea.

Yes, it is a standalone script. It is a modified version of the PeterKlausner's CacheAddon. It is working fine but i want to define in the topic text if a topic has to be cached or not.

The cache script is a new view script what will call a render script (the original view script) after some checks. But i cannot access to the value of my VAR in the topic.

I tried to write a Plugin for handling it. I registered there a TagHandler which is working. If I set a new value in the topic the handler shows correctly the new value. But I still have no access to it in the new view script. I tried it with "params->..." and with getPreferencesValue but getting everytime "Can't call ... undifined value".

I don't know what to do.

-- ThomasMueller2009 - 20 Jan 2009

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