Item11002: Implement a list formfield type

Basic spec:

• | MyList | list+checkbox | | a, b, c|

  which will call on Foswiki::Form::Checkbox to render the field. If a MyList field contains a, b then this should create

   %META:LISTITEM{name="..." key="MyList" value="a" seq="1"}%
   %META:LISTITEM{name="..." key="MyList" value="b" seq="2"}%

Then we can

%SEARCH{
  "listitems[key='MyList' AND value='b']"
  type="query"
}%

This is vastly more efficient for MongoDBPlugin (and any other QuerySearch back-end using indexes).

4.8s to render a page querying 52,387 topics similar to %SEARCH{"MyList~'*a*'" type="query}%.

1.02s to render the same page using %SEARCH{"listitems[key='MyList' AND value='a']" type="query}%.

-- PaulHarvey - 27 Jul 2011

Paul, what's the status on this. Is the extension releasable?

-- GeorgeClark - 24 Dec 2014

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