I'm having a little trouble with filtering a portal on a self-join. My relationship is a cartesian between VIEWER_vwr::ID and CalculationsFL::name (though, with a cartesian join, I'm not really sure it matters, as long as both fields are indexed) and my filter is as follows:

If ( not IsEmpty ( VIEWER_vwr::filter_g[2] ) ; PatternCount ( VIEWER_vwr::filter_g[2] ; CalculationsFL::name ) ; 1 )

The portal shows all the records, but as soon as I type something into the global filter, the portal displays nothing. The global filter on the layout, by the way, is the second repetition.

Any ideas what I am missing?

Thanks.

You didn't say what the purpose of the filtering is, but I am guessing you want something like:

IsEmpty ( VIEWER_vwr::filter_g[2] ) 

or

PatternCount ( CalculationsFL::name ; VIEWER_vwr::filter_g[2] )

Thanks, comment.

I looked at it again with fresh eyes and came up with this:

Case ( not IsEmpty ( VIEWER_vwr::filter_g[2] ) ; If ( PatternCount ( CodeFL::name ; VIEWER_vwr::filter_g[2] ) > 0 ; 1 ; 0 ) ; 1 )

This works as expected.

You didn't say what the purpose of the filtering is

Selection of a portal record triggers a script that navigates to records within the same table.

Thanks again.

I meant what is the purpose of the filtering itself; all you gave us is a formula that doesn't work, with no hint of what counts as "working".

Anyway, I see the problem was - as I suspected - the order of parameters in the PatternCount() function. All those manipulations with 0 and 1 are redundant: any number other than zero returns True in a Boolean test.