Merge pull request #116 from dkamburov/master

Allow combo to be defined without ngModel

Author: kdinev

src/igniteui.angular2.ts

@@ -703,13 +703,15 @@ export class IgComboComponent extends IgControlBase<IgCombo> implements ControlV
 		super.ngOnInit();
 		jQuery(this._el).on(this._widgetName.toLowerCase() + "selectionchanged", function (evt, ui) {
 			var items = ui.items;
-			if (items.length > 0) {
+			if (items.length > 0 && that._model) {
 				that._model.viewToModelUpdate(items[0].data[that._config.valueKey]);
 			}
 		});
 		this._dataSource = jQuery.extend(true, [], this._config.dataSource);
 		//manually call writeValue, because the LifeCycle has been changed and writeValue is executed before ngOnInit
-		this.writeValue(this._model.value);
+		if (this._model) {
+			this.writeValue(this._model.value);
+		}
 	}
 	writeValue(value) {
 		if (!!jQuery(this._el).data(this._widgetName)) {
@@ -740,7 +742,7 @@ export class IgComboComponent extends IgControlBase<IgCombo> implements ControlV
 
 			//check for changes in collection
 			this._changes = this._differ.diff(this._config.dataSource);
-			if (this._config.dataSource.length !== this._dataSource.length) {
+			if (this._config.dataSource && this._config.dataSource.length !== this._dataSource.length) {
 				this._dataSource = jQuery.extend(true, [], this._config.dataSource);
 				if (this._changes) {
 					this._changes.forEachAddedItem(r => element.data("igCombo").dataBind());

tests/unit/igcombo/combo.spec.ts

@@ -31,6 +31,22 @@ export function main() {
             });
         });
 
+        it('should initialize ig-combo without ngModel', (done) => {
+            var template = '<div><ig-combo [(widgetId)]="comboID" [(options)]="options" [changeDetectionInterval]="cdi"></ig-combo></div>';
+            TestBed.overrideComponent(TestComponent, {
+                set: {
+                    template: template
+                }
+            });
+            TestBed.compileComponents().then(() => {
+                let fixture = TestBed.createComponent(TestComponent);
+                fixture.detectChanges();
+                expect(fixture.debugElement.componentInstance.viewChild instanceof Infragistics.IgComboComponent)
+                    .toBe(true);
+                done();
+            });
+        });
+
         it('should be updated correctly if the ngModel value is updated', (done) => {
             var template = '<div><ig-combo [(widgetId)]="comboID" [(options)]="options" [changeDetectionInterval]="cdi" [(ngModel)]="combo.value1"></ig-combo></div>';
             TestBed.overrideComponent(TestComponent, {