TreeGrid w/ DataSource broken in Dev Mode

[dhoffman]

Hello,

First of all, thank you for SmartGWT! It's been a slick and flexible way for me to write pretty advanced and good-looking GUIs!

I'm posting now with a problem I've encountered in Dev Mode when trying to draw a TreeGrid that is bound to a DataSource. I have my own client-only DataSource to which I addData() by creating TreeNode objects and defining their property values. (For my project, I want the root of the Tree to be some value that is less than 1 or is not an Integer; I would prefer a null value for convenience.)

As it is I get the "Loading Data..." message in the TreeGrid and an unspecific error message on the stderr console of my IDE: "Uncaught JavaScript exception [Exception thrown and not caught] in http://localhost:8080/Ticketer/gwt/Workbench/hosted.html?Workbench, line 281". The sample code posted below renders fine if I compile and run without Dev Mode. It also works in Dev Mode if I refactor the TreeGrid/TreeGridField/TreeNode objects to ListGrid/ListGridField/ListGridRecord.

Am I missing something? Have I done something stupid? Thanks for taking a look!

public class TreeGridDatasourceTest extends VLayout {

    public TreeGridDatasourceTest() {
        TreeGrid grid = new TreeGrid();
        grid.setSize("125px", "100px");
        grid.setLeaveScrollbarGap(false);

        TreeGridField idField = new TreeGridField("TicketID", "Ticket ID");
        TreeGridField parentField = new TreeGridField("ParentID", "Parent ID");
        grid.setFields(idField, parentField);

        MyDS ticketDS = new MyDS("tickets");
        TreeNode node1 = new TreeNode();
        node1.setAttribute("TicketID", 1);
        /*Integer nullParent = null;
        node1.setAttribute("ParentID", nullParent);*/
        TreeNode node2 = new TreeNode();
        node2.setAttribute("TicketID", 2);
        node2.setAttribute("ParentID", 1);
        ticketDS.addData(node1);
        ticketDS.addData(node2);

        grid.setDataSource(ticketDS);
        grid.setAutoFetchData(true);
        this.addMember(grid);
    }

    private class MyDS extends DataSource {

        public MyDS(String id) {
            super(id);
            setClientOnly(true);
            DataSourceIntegerField ticketId = new DataSourceIntegerField("TicketID", "Ticket ID");
            ticketId.setPrimaryKey(true);
            DataSourceIntegerField parentId = new DataSourceIntegerField("ParentID", "Parent ID");
            parentId.setForeignKey("TicketID");

            setFields(ticketId, parentId);
        }
    }
}

[sjivan]

The TreeNode title needs to be a String, not a number. So change to call node1.setAttribute("TicketID", "1") instead. I have however updated SVN to handle this case by converting the title to a String if the user data has it as a number.

btw which version of GWT and Smart GWT are you using? With GWT 2.x and Smart GWT 2.1 exception handling is much better and I got a pretty useful stacktrace pointing to the issue.

Sanjiv

[dhoffman]

Thanks, again, Sanjiv! I have changed the TicketID attribute to a String value and the TreeGrid renders correctly!

I am using GWT 2.0.3 and SmartGWT 2.0, I will upgrade to SmartGWT 2.1 immediately!