Apple WebObjects 3.5 - Manual (Page 82)

Chapter 3 Creating a WebObjects Database Application
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Bindings in the Query Part
In the query part of the component, movieDisplayGroup.queryMatch.title is bound to the
Title text field. There are similar bindings to the Category and Rating text
fields. The
queryMatch bindings allow users to specify search criteria to use when
movieDisplayGroup next fetches movies. The Match button is bound to
movieDisplayGroup.qualifyDataSource , which actually performs the fetch.
For example, to display only R-rated comedies, a user types “Comedy” in the
Category text field, types “R” in the Rating text field, and clicks the Match
button.
movieDisplayGroup then refetches, selecting only movies whose category
values are set to Comedy and whose rating values are set to R.
Bindings in the Repetition Part
In the repetition part of the component where matching movies are listed,
movieDisplayGroup.displayedObjects is bound to a repetition. More specifically,
displayedObjects is bound to the repetition’s list attribute, providing a vector
of movies for the repetition to iterate over.
The movie variable is bound to the repetition’s item attribute to hold each movie
in turn, and movie.title is bound to the string element inside the repetition. These
bindings produce a list of movie titles.
The repetition’s string element is enclosed in a hyperlink. By clicking a movie
title, the user selects the corresponding movie.
Displays the binding for the
repetition’s
list attribute.
Displays the binding for the
repetition’s
item attribute.
Displays the binding for the
string’s
value attribute.