On Sat, 2008-01-05 at 00:43 +0100, simon wrote: > JSF presentation layouts (jsp pages, facelets pages, etc) are not meant > to be programming languages. They are meant only to select specific > parts of a model for presentation to the user. > > But EL isn't designed for invoking backing bean methods *passing* data > from the "customers model"; that is crossing the border from "selecting > data from the model" into a generic computing language.
In hindsight, I may have been a little too simplistic with my earlier reply. It *is* a good idea to avoid logic in pages, and to restrict them to just selecting data for display. But sometimes function calls with parameters *are* useful. You don't mention which version of JSF you are using. There is a wiki page here about passing parameters when using JSF1.1: http://wiki.apache.org/myfaces/Parameters_In_EL_Functions I believe it is *much* easier in JSF1.2 (which uses the new "unified EL"). However I haven't used that myself, so someone else will have to provide the details on that. Regards, Simon
