did you have a look at http://svn.apache.org/viewvc/tapestry/tapestry5/trunk/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/SelectZoneDemo.java?view=markup
http://svn.apache.org/viewvc/tapestry/tapestry5/trunk/tapestry-core/src/test/app1/SelectZoneDemo.tml?view=markup I guess you miss public SelectModel getMakeModel() { return new EnumSelectModel(CarMaker.class, this.messages); } another example from quickstart http://jumpstart.doublenegative.com.au/jumpstart/examples/ajax/select1 2011/8/17 Ulrich Stärk <[email protected]>: > Works like a charm here with 5.3-SNAPSHOT: > > [DEBUG] pages.Index [ENTER] onValueChanged(BMW) > [DEBUG] pages.Index [ENTER] findAvailableModels(BMW) > [DEBUG] pages.Index [ EXIT] findAvailableModels [["3 Series", "5 Series", "7 > Series"]] > [DEBUG] pages.Index [ EXIT] onValueChanged [Block[Body of Index:modelzone, at > context:Index.tml, > line 17]] > > Can you give us some details about your setup? Are you sure that what you > posted here is the only > thing in your page classes and template files or have you omitted something? > > Uli > > On 16.08.2011 23:20, Chris-1977 wrote: >> Hello all, >> >> I am new to Tapestry, and have been working through several of the tutorial >> examples. Something in particular that I am trying to do (and struggling to >> do so) is the chaining together of multiple select components. The approach >> to do so appears fairly straightforward, as documented towards the bottom of >> the page here: >> >> http://tapestry.apache.org/tapestry5.2-dev/tapestry-core/ref/org/apache/tapestry5/corelib/components/Select.html >> http://tapestry.apache.org/tapestry5.2-dev/tapestry-core/ref/org/apache/tapestry5/corelib/components/Select.html >> >> So, what I want to do is: >> >> 1. Load up a page that has a single populated select component visible >> 2. When a value is selected, a second select component should become >> visible, populated with values specific to what was chosen in the first >> select component >> >> The linked example above describes exactly this, and so I copied this code >> into my project. This included the following files: >> >> *1. CarMaker.java* >> >> public enum CarMaker >> { >> MERCEDES, AUDI, BMW; >> } >> >> >> *2. SelectZoneDemo.tml* >> >> <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd";> >> <t:form> >> <p> >> <t:errors /> >> </p> >> <p> >> <t:select t:id="carMaker" validate="required" >> zone="modelZone" /> >> </p> >> >> <t:zone t:id="modelZone" id="modelZone"> >> <t:if test="carMaker"> >> <p> >> <t:select t:id="carModel" model="availableModels" >> validate="required"/> >> </p> >> </t:if> >> </t:zone> >> >> <p> >> <t:submit value="literal:Submit" /> >> </p> >> </t:form> >> >> </html> >> >> *3. SelectZoneDemo.java* >> >> public class SelectZoneDemo >> { >> >> @Inject >> private Messages messages; >> >> @Property >> @Persist >> private CarMaker carMaker; >> >> @Property >> @Persist >> private String carModel; >> >> @InjectComponent >> private Zone modelZone; >> >> @Property >> @Persist >> private List<String> availableModels; >> >> public Object onValueChanged(CarMaker maker) >> { >> availableModels = findAvailableModels(maker); >> >> return modelZone.getBody(); >> } >> >> public List<String> findAvailableModels(final CarMaker maker) >> { >> switch (maker) >> { >> case AUDI: >> return Arrays.asList("A4", "A6", "A8"); >> case BMW: >> return Arrays.asList("3 Series", "5 Series", "7 Series"); >> case MERCEDES: >> return Arrays.asList("C-Class", "E-Class", "S-Class"); >> default: >> return Arrays.asList(); >> } >> } >> } >> >> Now, this all compiles fine, and using Jetty I can quickly start up the >> server and access the SelectZoneDemo page. When the page loads, the >> "CarMaker" select is visible and populated. When I select a value from this >> component, I have verified that the onValueChanged method in >> SelectZoneDemo.java is called (this was verified by adding the @Log >> annotation). However, the method never exits and never returns the >> modelZone.getBody() to the page. What I see in the console is the >> following: >> >> [DEBUG] pages.SelectZoneDemo [ENTER] onValueChanged(BMW) >> [DEBUG] pages.SelectZoneDemo [ENTER] findAvailableModels(BMW) >> [DEBUG] pages.SelectZoneDemo [ EXIT] findAvailableModels [["3 Series", "5 >> Series", "7 Series"]] >> >> As you can see, there's no EXIT log for onValueChanged. >> >> What I've been able to determine through some trial and error, is that the >> point at which the method "hangs" is on this line of onValueChanged: >> >> availableModels = findAvailableModels(maker); >> >> Furthermore, through additional testing I was able to determine that the act >> of setting any value at all to availableModels will result in the >> onValueChanged method not exiting. For example, I tried simply doing this: >> >> availableModels = new ArrayList<String>(); >> >> ...and got the same result. >> >> Now, if I comment out the line that sets a value to availableModels, the >> onValueChanged method will exit, but the modelZone on SelectZoneDemo.tml >> remains hidden. >> >> At this point, I'm completed stumped. I've googled everything that I can >> think of, and at this point I'm sure that my problem must be a fundamental >> misunderstanding of how Tapestry works. If anyone could offer some >> assistance, I would be very grateful. >> >> >> >> -- >> View this message in context: >> http://tapestry.1045711.n5.nabble.com/Chaining-of-Select-components-tp4705879p4705879.html >> Sent from the Tapestry - Dev mailing list archive at Nabble.com. >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
