Angular2-将ngFor项目作为参数传递到管道中? [英] Angular2 - passing ngFor item into a pipe as a parameter?
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问题描述
我试图将ngFor项作为参数传递给管道,但出现错误:
Im trying to pass an ngFor item into a pipe as a paramter but get an error:
异常:调用节点模块失败,并显示错误:错误:模板 解析错误:TypeError:无法读取的属性'toUpperCase' 未定义("{{name}} ng容器[ERROR->] * ngFor =让等级为 评分| groupFilter:{{name}}"
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);
}
}
推荐答案
从{{name}}
{{}}
从不与(event)="..."
[prop]="..."
或*someDirective="..."
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