An important extenstion to Lars' display_template example:
If you have used the display_eval parameter in your element and then try the display_template above you will be surprised to find the original value presented.
That's because the display_eval param doesn't modify the column value, it makes a new column. Extending the above example:
...
-elements {
success_bool {
display_eval {[ad_decode $success_bool t Success "<em>FAIL</em>"]}
display_template mailto:{@foo.success_bool___display;noquote@}
}
}
Note that the separator is THREE underscore characters. In a similar way if you have constructed an url with the link_url_eval param, you can access that via col_name___link_url
If you want some insight into the upvar magic of Lars and the completeness of listbuilder functionality - take a look at the source for template::list::prepare_for_rendering !
