在角度2中如何保留查询参数并添加其他查询参数以进行路由 [英] In angular 2 how to preserve query params and add additional query params to route

问题描述

例如我在路线 / cars？type = coupe ，我想用其他查询参数导航到同一个端点（但保留现有的查询参数）。我正在尝试这样的事情

For example I am on route /cars?type=coupe and I want to navigate to the same endpoint with additional query params (but keeping existing one). I am trying something like this

<a [routerLink]="['/cars']" [queryParams]="{model: 'renault'}" preserveQueryParams>Click</a>

保留初始查询参数（type = cars）但忽略添加的（model = renault） 。这是预期/正确的行为还是某种错误？看起来preserveQueryParams优先于queryParams？还有其他顺利解决方案吗？

The initial query params are preserved (type=cars) but added ones (model=renault) are ignored. Is this expected/correct behavior or is some kind of bug? Looks like preserveQueryParams has priority over queryParams? Is there any other smooth solution?

推荐答案

在Angular 4+中， preserveQueryParams 已被弃用，转而支持 queryParamsHandling 。选项是'merge'或'保留'。

In Angular 4+, preserveQueryParams have been deprecated in favor of queryParamsHandling. The options are either 'merge' or 'preserve'.

代码内示例（用于 NavigationExtras ）：

this.router.navigate(['somewhere'], { queryParamsHandling: "preserve" });

模板内例子：

<a [routerLink]="['somewhere']" queryParamsHandling="merge">

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