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fix(table): render cells even if data is falsy #7914

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merged 4 commits into from Oct 30, 2017
Merged

fix(table): render cells even if data is falsy #7914

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7fd399f
fix(table): render cells even if data is falsy
andrewseguin Oct 19, 2017
2496688
add test
andrewseguin Oct 20, 2017
862a13d
test naming
andrewseguin Oct 23, 2017
6df1f31
fix all usages of evensimpler
andrewseguin Oct 24, 2017
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45 changes: 44 additions & 1 deletion src/cdk/table/table.spec.ts
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Expand Up @@ -38,7 +38,8 @@ describe('CdkTable', () => {
UndefinedColumnsCdkTableApp,
WhenRowCdkTableApp,
WhenRowWithoutDefaultCdkTableApp,
WhenRowMultipleDefaultsCdkTableApp
WhenRowMultipleDefaultsCdkTableApp,
BooleanRowCdkTableApp
],
}).compileComponents();
}));
Expand Down Expand Up @@ -107,6 +108,21 @@ describe('CdkTable', () => {
});
});

it('should render cells even if row data is falsy', () => {
const booleanRowCdkTableAppFixture = TestBed.createComponent(BooleanRowCdkTableApp);
const booleanRowCdkTableElement =
booleanRowCdkTableAppFixture.nativeElement.querySelector('cdk-table');
booleanRowCdkTableAppFixture.detectChanges();

expectTableToMatchContent(booleanRowCdkTableElement, [
[''], // Header row
['false'], // Data rows
['true'],
['false'],
['true'],
]);
});

it('should be able to apply class-friendly css class names for the column cells', () => {
const crazyColumnNameAppFixture = TestBed.createComponent(CrazyColumnNameCdkTableApp);
const crazyColumnNameTableElement =
Expand Down Expand Up @@ -619,6 +635,16 @@ class FakeDataSource extends DataSource<TestData> {
}
}

class BooleanDataSource extends DataSource<boolean> {
_dataChange = new BehaviorSubject<boolean[]>([false, true, false, true]);

connect(): Observable<boolean[]> {
return this._dataChange;
}

disconnect() { }
}

@Component({
template: `
<cdk-table [dataSource]="dataSource">
Expand Down Expand Up @@ -651,6 +677,23 @@ class SimpleCdkTableApp {
@ViewChild(CdkTable) table: CdkTable<TestData>;
}

@Component({
template: `
<cdk-table [dataSource]="dataSource">
<ng-container cdkColumnDef="column_a">
<cdk-header-cell *cdkHeaderCellDef></cdk-header-cell>
<cdk-cell *cdkCellDef="let data"> {{data}} </cdk-cell>
</ng-container>

<cdk-header-row *cdkHeaderRowDef="['column_a']"></cdk-header-row>
<cdk-row *cdkRowDef="let row; columns: ['column_a']"></cdk-row>
</cdk-table>
`
})
class BooleanRowCdkTableApp {
dataSource = new BooleanDataSource();
}

@Component({
template: `
<cdk-table [dataSource]="dataSource">
Expand Down
5 changes: 1 addition & 4 deletions src/cdk/table/table.ts
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Expand Up @@ -342,10 +342,7 @@ export class CdkTable<T> implements CollectionViewer {
// CdkCellOutlet was instantiated as a result of `createEmbeddedView`.
this._rowPlaceholder.viewContainer.createEmbeddedView(row.template, context, index);

// Insert empty cells if there is no data to improve rendering time.
const cells = rowData ? this._getCellTemplatesForRow(row) : [];

cells.forEach(cell => {
this._getCellTemplatesForRow(row).forEach(cell => {
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Needs a unit test

CdkCellOutlet.mostRecentCellOutlet._viewContainer.createEmbeddedView(cell.template, context);
});

Expand Down