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Item6573: PreferencesPlugin cannot save empty settings

Item Form Data

AppliesTo: Component: Priority: CurrentState: WaitingFor: TargetRelease ReleasedIn
Extension PreferencesPlugin Normal Closed   major 6.0.0

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Applies To:
Current State:
Waiting For:
Target Release:
Released In:


I am trying to configure the form for the PreferencesPlugin used for WebPreferences and I find no way to set a variable to an empty string.When I clear a text field this is interpreted as 'do not change' by the PreferencesPlugin. There is also no way to use a special word like none as for the TopicParent. This would be needed for NOSEARCHALL for instance which has to be set to an empty string to disable it.

PreferencesPlugin should be extended in a way to support this. The best I can see is a field attribute ( E for instance) that would allow saving empty values (as opposed to the M attribute).

-- TWiki:Main/StefanWalter - 2010-08-30

Good point. Setting this issue to "confirmed". Please help fix bugs.

-- TWiki:Main.PeterThoeny - 2010-08-30


  • Set TEXT_FIELD =

-- TWiki:Main.PeterThoeny - 2013-09-28

This seems to be is fixed now, verified with example above.

-- TWiki:Main.PeterThoeny - 2013-09-28

Summary PreferencesPlugin cannot save empty settings
ReportedBy TWiki:Main.StefanWalter
Codebase ~twiki4, 5.0.0
SVN Range TWiki-5.0.0, Sat, 21 Aug 2010, build 19350
AppliesTo Extension
Component PreferencesPlugin
Priority Normal
CurrentState Closed


TargetRelease major
ReleasedIn 6.0.0
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Topic revision: r4 - 2013-10-15 - PeterThoeny
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