Angular 获取过滤后的 ng-repeat 的长度 [英] Angular get length of filtered ng-repeat

问题描述

我已从 v 1.0.8 升级到 Angular 1.2.9，以帮助提高我的应用程序的性能.

我介绍了提高速度的轨道.

我曾经拥有的

我现在拥有的

我有分页来查找filteredItems的长度.那已经不存在了.此外，其他一些 JS 需要过滤项来进行日志记录、分析等

在 HTML 视图中，我可以获得应用过滤器后 ng-repeat 的长度

{{(结果 |过滤器:过滤器价格|过滤器:filterCarCategories |过滤器:filterCarTypes |过滤器: filterAirConditioning |过滤器:过滤器传输|过滤器:filterFourByFour |过滤器:filterFuelType |过滤器:filterNumberOfDoors |过滤器:filterOnAirport |过滤器:filterFuelPolicy |过滤器:filterUnlimitedMileage |过滤器:filterFreeCancellation |过滤器:filterTheftProtection |过滤器:filterCDW |过滤器:filterTaxesIncluded |过滤器:过滤器提供者).长度}}

有点啰嗦，但确实返回了我想要的数字.如何将其传递给 $scope ?

解决方案

您可以创建一个中间变量来保存过滤后的数组:

data-ng-repeat="结果过滤结果 = (结果 | filter:filterPrice | filter:filterCarCategories | etc.)"

然后可以使用:

filteredResults.length

I have upgraded to Angular 1.2.9 from v 1.0.8 to help with the performance of my app.

I have introduced track by which has improved the speed.

What I used to have

<div class="result row"
    data-ng-repeat="result in (filteredItems =
            (results |
            filter: filterPrice |
            filter: filterCategories |
            filter: filterTypes |
            filter: filterAirConditioning |
            filter: filterTransmission |
            filter: filterFourByFour |
            filter: filterFuelType |
            filter: filterNumberOfDoors |
            filter: filterOnAirport |
            filter: filterFuelPolicy |
            filter: filterUnlimitedMileage |
            filter: filterFreeCancellation |
            filter: filterTheftProtection |
            filter: filterCDW |
            filter: filterTaxesIncluded |
            filter: filterProviders ) )  |
        orderBy: [orderByOptions, orderByPriceLowToHigh, orderByPriority] |
        limitTo: pageSize">

what I have now

<div class="result row"
    data-ng-repeat="result in results |
        filter: filterPrice |
        filter: filterCarCategories |
        filter: filterCarTypes |
        filter: filterAirConditioning |
        filter: filterTransmission |
        filter: filterFourByFour |
        filter: filterFuelType |
        filter: filterNumberOfDoors |
        filter: filterOnAirport |
        filter: filterFuelPolicy |
        filter: filterUnlimitedMileage |
        filter: filterFreeCancellation |
        filter: filterTheftProtection |
        filter: filterCDW |
        filter: filterTaxesIncluded |
        filter: filterProviders |
        orderBy: [orderByOptions, orderByPriceLowToHigh, orderByPriority] |
        startFrom: currentPage*pageSize |
        limitTo: pageSize track by $index">

I have pagination which looked for the length of filteredItems. That no longer exists. Also, some other JS needs the filteredItems for logging, analytics, etc

In the HTML view I can get the length of the ng-repeat after filters have been applied

{{(results |
    filter: filterPrice |
    filter: filterCarCategories |
    filter: filterCarTypes |
    filter: filterAirConditioning |
    filter: filterTransmission |
    filter: filterFourByFour |
    filter: filterFuelType |
    filter: filterNumberOfDoors |
    filter: filterOnAirport |
    filter: filterFuelPolicy |
    filter: filterUnlimitedMileage |
    filter: filterFreeCancellation |
    filter: filterTheftProtection |
    filter: filterCDW |
    filter: filterTaxesIncluded |
    filter: filterProviders)
    .length}}

which is a bit of a mouthful but does return the number I want. How can I pass this to a $scope ?

解决方案

You can create an intermediate variable that will hold the filtered array:

data-ng-repeat="result in filteredResults = (results | filter:filterPrice | filter:filterCarCategories | etc.)"

and then can use:

filteredResults.length

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