Programmed Database Display

This example shows two nested dbdisplay components. The outer dbdisplay selects all possible countries from the database. The inner dbdisplay lists all guests from that country.

The interesting thing about this example is the constraint of the inner dbdisplay. This constraint compares with the country selected by the outer dbdisplay. This is realized by a dbconstrain component, that has an expression as value parameter. This expression accesses the corresponding field of the outer dbdisplay.