SID-02033: Number of Topics below Parent-Topic

Status:	Answered	TWiki version:	6.0.0	Perl version:
Category:	CategorySearch	Server OS:		Last update:	10 years ago

Hey,

I'm searching for a way to get the number of topics below one parent topic AND all those topics below these topics and so on.

%SEARCH{ "META\:TOPICPARENT.*\"Hardware\"" type="regex"}%

does get me the Children of "Hardware" and the Number, but it just stops there and I don't have a way to get the children of the children...

Thanks for your help.

-- Martin Thieme - 2015-03-11

Discussion and Answer

You could do a nested search, see example in FormattedSearch. However, this can be slow. For example if a topic has 20 children you would do 21 searches.

For better performance you could do a formatted search that creates a SpreadSheetPlugin hash to store all topic's parent, then recursively traverse the hash to compose the list of children, children's children, etc. See blog Advanced TWiki Spreadsheet Formulas: Power and Flexibility - Not For Grandma for inspiration.

Finally, you could install the TreePlugin. It can list all descendants in a tree.

-- Peter Thoeny - 2015-03-13

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-- Peter Thoeny - 2015-12-03

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