Angular2 - 将 ngFor 项目作为参数传递到管道中？

Question

我试图将 ngFor 项作为参数传递到管道中，但出现错误：

Exception: Call to Node module failed with error: Error: Template parse errors: TypeError: Cannot read property 'toUpperCase' of undefined ("{{name}} ng-container [ERROR ->]*ngFor="let rating of ratings | groupFilter:{{name}} "

这是html:

            <tr *ngFor="let name of measureNames">
            <td>{{name}}</td>
            <td><input class="form-control"></td>
            <ng-container *ngFor="let rating of ratings | groupFilter:{{name}} ">
                <ng-container *ngFor="let key of rating | keys">
                    <td *ngIf="key=='measureRating'"><input class="form-control" value={{rating[key]}}></td>
                </ng-container>
            </ng-container>
        </tr>

这是我的烟斗：

    import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
    name: 'groupFilter',
    pure: false
})

export class GroupFilterPipe implements PipeTransform {
    transform(items: any[], args: string): any {
        console.log("Filter ARGS: " + args);
        return items.filter(item => item.measureName==args);
    }
}

Answer 1

从 {{name}}

中删除 {{}}

{{}} 从不与 (event)="..." [prop]="..." 或 *someDirective="..."

一起使用

Angular2 - 将 ngFor 项目作为参数传递到管道中？

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