我使用奥里利亚并希望过滤鉴于集合（阵列），而不是在视图模型。

I am using aurelia and want to filter a collection (array) in view rather than in view model.

我想下面的语法这样做的：

I am trying the following syntax to do so:

<div class="col-sm-7  col-md-7 col-lg-7 ${errors.filter(function(err){return err.Key==='car.Model';}).length >0? 'alert alert-danger' :''}">
            <span repeat.for="error of errors">
                <span if.bind="error.Key==='car.Model'">
                    ${error.Message}
                </span>
            </span>
</div>

和我正在下面的浏览器控制台错误：

And I am getting following error in browser console:

错误：分析器错误：在第28栏缺少预期）errors.filter（功能（错误）{返回err.Key ==='car.Model'] 。

这是可能的angularJS如下：

This is possible in angularJS as follows:

 <div class="small-7  medium-7 large-7 columns end">
        <span class="error" ng-repeat="error in errors  | filter:{ Key: 'car.Model'}">
            <span class="error-message">
                {{error.Message}}
            </span>
        </span>
    </div>

在Aurelia酒店类似的事情也可能吗？

Is similar thing also possible in aurelia?

我也很想知道如何收集/阵列可以在 repeat.for 过滤在奥里利亚（类似于 NG-重复）。我试图使用过滤功能以类似的方式，但它也没有工作，我得到了类似的错误。

I would also love to know how a collection/array can be filtered in repeat.for in aurelia (similar to ng-repeat). I tried to use filter function in similar fashion but it too didn't work and I got similar error.

推荐答案

这是一个有点尴尬。但一个小小的研究（这是我应该做的事前：P）后，我已经得到了答案。

It's a little embarrassing. But after a little research (which I should have done beforehand :P) I have got the answer.

可以使用ValueConverter做如下所示：http://jdanyow.github.io/aurelia-converters-sample/.

It can be done using ValueConverter as shown here: http://jdanyow.github.io/aurelia-converters-sample/.

我认为这是相当凉爽。

现在我的code是这样的：

Now my code looks like this:

<div class="col-sm-7  col-md-7 col-lg-7 alert alert-danger" if.bind="errors | hasPropertyValue:'Key':'car.Model'">
    <span repeat.for="error of errors | filterOnProperty:'Key':'car.Model'">
        <span>
           ${error.Message}
        </span>
    </span>
</div>

和我在打字稿定义夫妇valueconverters的（ valueconverters.ts ）

And I have defined couple of valueconverters in TypeScript (valueconverters.ts):

export class FilterOnPropertyValueConverter {
toView(array: {}[], property: string, exp: string) {

    if (array === undefined || array === null || property === undefined || exp === undefined) {
        return array;
    }
    return array.filter((item) => item[property].toLowerCase().indexOf(exp.toLowerCase()) > -1);
}
}

export class HasPropertyValueValueConverter {
toView(array: {}[], property: string, exp: string) {

    if (array === undefined || array === null || property === undefined || exp === undefined) {
        return false;
    }
    return array.filter((item) => item[property].toLowerCase().indexOf(exp.toLowerCase()) > -1).length > 0;
}
}

和我最后的进口，这些在我看来：＆LT;进口来自=yourPath / valueconverters＆GT;＆LT; /进口＆GT;

And I finally imported these in my view: <import from="yourPath/valueconverters"></import>