类型“对象"上不存在属性“过滤器" [英] Property 'filter' does not exist on type 'Object'

问题描述

在将代码更新为HttpClient之后，我无法使用filter()处理响应.我一直在获取类型"对象"上不存在的属性过滤器":

After updating my code to HttpClient I can't get filter() to work with the response. I keep getting Property 'filter' does not exist on type 'Object':

TS :

liqOnChange(selection): void  {
        this.http.get(this.json_liq).subscribe(res => {
            this.arr = res.filter(
                res => res.id == selection.target.value);
        });
}

推荐答案

filter是一种数组方法，在您的情况下res不能用于对象.

filter is an array method which cannot be used for objects in your case res.

首先检查res是否为数组.

if(Array.isArray(res)){
   this.arr = res.filter(
                res => res.id == selection.target.value);
}

或将类型设置为res作为(res: Array<any>)

如果您的api返回一个对象，则在大多数情况下应该是这样，您不能在此处使用filter方法，而应该将其用于res对象内部的数组.

If your api is returning an object, in most cases it should be, you can't use filter method here, you should be using it for an array inside res object.

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