Undefined subroutine getTopicTitle

The Update to DBCachePlugin Version from 28 May 2018 added the TopicTitlePlugin to fosswiki wich crashed my natskin installation with following error:

Undefined subroutine &Foswiki::Plugins::DBCachePlugin::getTopicTitle called at /var/www/wiki/lib/Foswiki/Plugins/NatSkinPlugin/HtmlTitle.pm line 71.
 at /var/www/wiki/lib/Foswiki/Plugins/NatSkinPlugin/HtmlTitle.pm line 71.
        Foswiki::Plugins::NatSkinPlugin::HtmlTitle::getTopicTitle("Wiki", "GateAllgemein") called at /var/www/wiki/lib/Foswiki/Plugins/NatSkinPlugin/HtmlTitle.pm line 52
        Foswiki::Plugins::NatSkinPlugin::HtmlTitle::render(Foswiki=HASH(0x1dd9080), Foswiki::Attrs=HASH(0x322b690), "GateAllgemein", "Wiki", Foswiki::Meta=HASH(0x321a558)) called at /var/www/wiki/lib/Foswiki/Plugins/NatSkinPlugin.pm line 123
        Foswiki::Plugins::NatSkinPlugin::__ANON__(Foswiki=HASH(0x1dd9080), Foswiki::Attrs=HASH(0x322b690), "GateAllgemein", "Wiki", Foswiki::Meta=HASH(0x321a558)) called at /var/www/wiki/lib/Foswiki/Func.pm line 660
        Foswiki::Func::__ANON__(Foswiki=HASH(0x1dd9080), Foswiki::Attrs=HASH(0x322b690), Foswiki::Meta=HASH(0x321a558)) called at /var/www/wiki/lib/Foswiki.pm line 3555
        Foswiki::_expandMacroOnTopicRendering(Foswiki=HASH(0x1dd9080), "HTMLTITLE", "\x{a}  \"\$percntIF{\x{a}\x{9} \\\"'\$topic'!='WebHome' or '\$percntENCODE{\\\"\$t"..., Foswiki::Meta=HASH(0x321a558)) called at /var/www/wiki/lib/Foswiki.pm line 3417
        Foswiki::_processMacros(Foswiki=HASH(0x1dd9080), "<!DOCTYPE html>\x{a}<html class=\"natHtml\" xmlns=\"http://www.w3.or"..., CODE(0x1da7bf0), Foswiki::Meta=HASH(0x321a558), 16) called at /var/www/wiki/lib/Foswiki.pm line 3175
        Foswiki::innerExpandMacros(Foswiki=HASH(0x1dd9080), SCALAR(0x1da8898), Foswiki::Meta=HASH(0x321a558)) called at /var/www/wiki/lib/Foswiki.pm line 3740
        Foswiki::expandMacros(Foswiki=HASH(0x1dd9080), "<!DOCTYPE html>\x{a}<html class=\"natHtml\" xmlns=\"http://www.w3.or"..., Foswiki::Meta=HASH(0x321a558)) called at /var/www/wiki/lib/Foswiki/Meta.pm line 3359
        Foswiki::Meta::expandMacros(Foswiki::Meta=HASH(0x321a558), "<!DOCTYPE html>\x{a}<html class=\"natHtml\" xmlns=\"http://www.w3.or"...) called at /var/www/wiki/lib/Foswiki/UI/View.pm line 481
        Foswiki::UI::View::_prepare("<!DOCTYPE html>\x{a}<html class=\"natHtml\" xmlns=\"http://www.w3.or"..., Foswiki::Meta=HASH(0x321a558), 0) called at /var/www/wiki/lib/Foswiki/UI/View.pm line 441
        Foswiki::UI::View::view(Foswiki=HASH(0x1dd9080)) called at /var/www/wiki/lib/Foswiki/UI.pm line 374
        Foswiki::UI::__ANON__() called at /usr/share/perl5/Error.pm line 421
        eval {...} called at /usr/share/perl5/Error.pm line 413
        Error::subs::try(CODE(0x11b6b20), HASH(0x1dd8a98)) called at /var/www/wiki/lib/Foswiki/UI.pm line 500
        Foswiki::UI::_execute(Foswiki::Request=HASH(0x1ddb150), CODE(0x11b6c58), "view", 1) called at /var/www/wiki/lib/Foswiki/UI.pm line 326
        Foswiki::UI::handleRequest(Foswiki::Request=HASH(0x1ddb150)) called at /var/www/wiki/lib/Foswiki/Engine/CGI.pm line 100
        Foswiki::Engine::CGI::run(Foswiki::Engine::CGI=HASH(0x191e1e8)) called at /var/www/wiki/bin/view line 30.

Natskin its reachable after disableing DBCachePlugin and TopicTitlePlugin but shows some strange codefragments on my side.(%DBQUERY{ "total_likes>0" topic=)

Any help would be appreciated.

-- ReneBredow - 31 May 2018

A new NatSkin version will be released soon. We are currently in a transition phase where the TopicTitle feature is moved into a plugin of its own (TopicTitlePlugin) instead of implemented redundantly in a lot of separate plugins.

A quick fix for you is to fix the offending line 71 in lib/Foswiki/Plugins/NatSkinPlugin/HtmlTitle.pm by replacing

Foswiki::Plugins::DBCachePlugin::getTopicTitle

with

Foswiki::Func::getTopicTitle

See also Tasks.Item14693

-- MichaelDaum - 31 May 2018

Thank you for your quick response. Your fix solved that problem.

-- ReneBredow - 01 Jun 2018

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