在ngFor中使用管道和索引的角度

时间:2017-05-16 20:50:19

标签: angular

Angular在测试版中有很多变化,我的问题是尝试在ngFor中使用管道和索引,我收到此消息:

Parser Error: Unexpected token =

The pipe 'let' could not be found  

当我使用此代码时:

 <div style="overflow-y: scroll; max-height: 200px;">
        <div (click)="showComentario(index);" *ngFor="let comment of comentarios| filterSource:selectedSource | let index=index; ">
            {{comment.comment}}
        </div>
    </div>

如果我改变这样的顺序:

<div style="overflow-y: scroll; max-height: 200px;">
    <div (click)="showComentario(index);" *ngFor="let comment of comentarios;let index=index;| filterSource:selectedSource |  ">
        {{comment.comment}}
    </div>
</div>

我收到此消息:

Template parse errors:
TypeError: key[0] is undefined  



Parser Error: Unexpected token |, expected identifier, keyword, or string at column 47 in [let comment of comentarios; let index=index; 

我如何同时使用管道和索引?

修改 我修改了代码,如下所示:

<div style="overflow-y: scroll; max-height: 200px;">
    <div (click)="showComentario(index);" *ngFor="let comment of comentarios | filterSource:selectedSource;let index=index ">
        {{comment.comment}}
    </div>
</div>

我一直收到这些错误: TypeError: key[0] is undefinedParser Error: Unexpected token |

1 个答案:

答案 0 :(得分:10)

尝试以下,

<div (click)="showComentario(i)" *ngFor="let comment of comentarios | filterSource : selectedSource; index as i" >
  {{comment.comment}}
</div>

希望这会有所帮助!!