Hi, New Tapestry user here, started with a bootstrapped 5.7.3 and experimenting.
I tried to follow the grid example https://tapestry.apache.org/current/apidocs/org/apache/tapestry5/corelib/components/Grid.html quite literally, however I had issues with coercion, so I simplified to try to root out the issue. What I now have is the simplest of table with a column for Delete links. So the source is a List<Blah> while the row is of course a Blah. onActionFromDelete only takes a Blah as argument. And regardless, I get org.apache.tapestry5.ioc.internal.OperationException Exception in method net.xytra.cirrus.pages.blog.admin.Languages.onActionFromDelete(net.xytra.cirrus.pages.blog.admin.Languages$Blah), parameter #1: org.apache.tapestry5.commons.util.UnknownValueException: Could not find a coercion from type java.lang.String to type net.xytra.cirrus.pages.blog.admin.Languages$Blah. Here's the grid in tml: <html t:type="blogAdminLayout" title="List languages" xmlns:t="http://tapestry.apache.org/schema/tapestry_5_4.xsd"; xmlns:p="tapestry:parameter"> Available Languages<br/> <t:grid source="languages" row="test" add="delete"> <p:deleteCell> <t:actionlink t:id="delete" context="test">Delete</t:actionlink> </p:deleteCell> </t:grid> Add language </html> And here's the class: public class Languages { @Property private Blah test; public List<Blah> getLanguages() { List<Blah> list = new ArrayList<Blah>(); list.add(new Blah(1)); list.add(new Blah(2)); return list; } public void onActionFromDelete(Blah test) { System.err.println("--- onActionFromDelete: test.class="+test.getClass().getName()+" and test="+test); } public static class Blah { private int foo; public Blah(int bar) { foo = bar; } public String toString() { return Integer.toString(foo); } } } What am I doing wrong? There is really no room for error, the Blah class is defined right there in the same class and the current row object has absolutely no reason to be converted to String. Kindly help, Jonathan
