Throw descriptive error when filtering without condition - 7.3.x

CHANGELOG.md

@@ -4,6 +4,9 @@ All notable changes for each version of this project will be documented in this
 
 ## 7.3.4
 
+- `IgxGrid`, `IgxTreeGrid`, `IgxHierarchicalGrid`
+    - **Breaking Change** The **condition** parameter of the `filterGlobal` method is no longer optional. When the filterGlobal method is called with an invalid condition, it will not clear the existing filters for all columns.
+
 ### New feature
 - `igxSlider` - exposing new `labels` property accepting a collection of literal values that become equally spread over the slider, by placing each element as a thumb label.
 - `igxSlider` - deprecate **isContiunous** property.

projects/igniteui-angular/src/lib/grids/api.service.ts

@@ -310,6 +310,10 @@ export class GridBaseAPIService <T extends IgxGridBaseComponent & IGridDataBinda
     }
 
     public filter_global(term, condition, ignoreCase) {
+        if (!condition) {
+            return;
+        }
+
         const grid = this.grid;
         const filteringTree = grid.filteringExpressionsTree;
         grid.endEdit(false);
@@ -318,11 +322,9 @@ export class GridBaseAPIService <T extends IgxGridBaseComponent & IGridDataBinda
         }
 
         filteringTree.filteringOperands = [];
-        if (condition) {
-            for (const column of grid.columns) {
-                this.prepare_filtering_expression(filteringTree, column.field, term,
-                    condition, ignoreCase || column.filteringIgnoreCase);
-            }
+        for (const column of grid.columns) {
+            this.prepare_filtering_expression(filteringTree, column.field, term,
+                condition, ignoreCase || column.filteringIgnoreCase);
         }
 
         grid.filteringExpressionsTree = filteringTree;

projects/igniteui-angular/src/lib/grids/filtering/grid-filtering.service.ts

@@ -150,7 +150,9 @@ export class IgxFilteringService implements OnDestroy {
             this.gridAPI.filter(field, value, conditionOrExpressionTree, filteringIgnoreCase);
         } else {
             const expressionsTreeForColumn = this.grid.filteringExpressionsTree.find(field);
-            if (expressionsTreeForColumn instanceof FilteringExpressionsTree) {
+            if (!expressionsTreeForColumn) {
+                throw new Error('Invalid condition or Expression Tree!');
+            } else if (expressionsTreeForColumn instanceof FilteringExpressionsTree) {
                 this.gridAPI.filter(field, value, expressionsTreeForColumn, filteringIgnoreCase);
             } else {
                 const expressionForColumn = expressionsTreeForColumn as IFilteringExpression;
@@ -191,7 +193,7 @@ export class IgxFilteringService implements OnDestroy {
     /**
      * Filters all the `IgxColumnComponent` in the `IgxGridComponent` with the same condition.
      */
-    public filterGlobal(value: any, condition?, ignoreCase?) {
+    public filterGlobal(value: any, condition, ignoreCase?) {
         this.gridAPI.filter_global(value, condition, ignoreCase);
 
         // Wait for the change detection to update filtered data through the pipes and then emit the event.

projects/igniteui-angular/src/lib/grids/grid-base.component.ts

@@ -3633,7 +3633,7 @@ export abstract class IgxGridBaseComponent extends DisplayDensityBase implements
      * @param ignoreCase
      * @memberof IgxGridBaseComponent
      */
-    public filterGlobal(value: any, condition?, ignoreCase?) {
+    public filterGlobal(value: any, condition, ignoreCase?) {
         this.filteringService.filterGlobal(value, condition, ignoreCase);
     }
 

projects/igniteui-angular/src/lib/grids/grid/grid-filtering.spec.ts

@@ -597,6 +597,27 @@ describe('IgxGrid - Filtering actions', () => {
         verifyExpressionUI(expressionUIs[3], expression21, FilteringLogic.And, FilteringLogic.Or);
         verifyExpressionUI(expressionUIs[4], expression22, null, FilteringLogic.And);
     }));
+
+    it('Should throw descriptive error when filter() is called without condition', fakeAsync(() => {
+        expect(() => {
+            grid.filter('Downloads', 100);
+            fix.detectChanges();
+        }).toThrowError('Invalid condition or Expression Tree!');
+    }));
+
+    it('Should not clear previous filtering when filterGlobal() is called with invalid condition', fakeAsync(() => {
+        grid.filter('Downloads', 100, IgxNumberFilteringOperand.instance().condition('greaterThan'), true);
+        fix.detectChanges();
+        expect(grid.rowList.length).toEqual(4);
+        expect(grid.getCellByColumn(0, 'Downloads').value).toEqual(254);
+
+        // Execute global filtering with invalid condition.
+        grid.filterGlobal(1000, null);
+        fix.detectChanges();
+
+        expect(grid.rowList.length).toEqual(4);
+        expect(grid.getCellByColumn(0, 'Downloads').value).toEqual(254);
+    }));
 });
 
 const expectedResults = [];