ListGrid.js accessing null reference

Technical Q&A
1

Nightly build 2010-11-25

My code:

isc.DataSource.create({
	ID:"entityTypesDS",
	fields: [ { name: "title" }, {name: "entityType"} ],
	clientOnly: true,
	testData: [ 
		{title: "Сессии", entityType: "Session"}, 
		{title: "Станции", entityType: "Station"}, 
		{title: "Сотрудники", entityType: "Employee"} 
		]
 });

isc.ListGrid.create({
	ID: "entityTypesList",
	showHeader: false,
	leaveScrollbarGap: false,
	showFilterEditor: true,
	filterOnKeypress: true,
	dataProperties: {
		fetchMode: "local",
		useClientFiltering: true
	},
	fields: [ { name: "title" } ],
	dataSource: "entityTypesDS",
	autoFetchData: true,
	// behavior:
	generateDoubleClickOnEnter: true,
	recordDoubleClick: ".."
});
				isc.SectionStack.create({
					ID: "leftSideLayout",
					width: 280,
					showResizeBar: true,
					visibilityMode: "multiple",
					animateSections: true,
					sections: [
						{ title: "Объекты системы", autoShow: true, items: [entityTypesList] },
						{ title: "Отчеты", autoShow: true, items: [] },
						{ title: "Администрирование", autoShow: false, items: [ 
							isc.IButton.create({
								title: "Open debug console", 
								click:"isc.showConsole()",
								width: "100%"
							})] 
						}
					]
				})

Callstack:
getField()
_canFocusInEditor()
findNextEditCell()
setFields()
prepareForDraw()
draw()
invokeSuper()
Super()
draw()
drawPeers()
_completeHTMLInit()
draw()
invokeSuper()
draw()
layoutChildren()
drawChildren()
draw()
layoutChildren()
drawChildren()
draw()
layoutChildren()
drawChildren()
draw()
(?)()
handleEvent()
handleLoad()

ListGrid.js:
_canFocusInEditor : function (rowNum, colNum) {
22971
22972 var fieldName = this.getFieldName(colNum),
22973 editForm = this._editRowForm,
22974 editItem = editForm ? editForm.getItem(fieldName) : null;
22975 if (editItem) return editItem._canFocus();
22976
22977 var field = this.getField(fieldName);
22978 if (field.canFocus != null) return field.canFocus;

Here field is null and accessing field.canFocus fails.

2

Fixed, thanks for the clear report. This overnight regression would break lots of things so we’ve just kicked off new nightly builds - look for them in around 4 hours.