从:user3777549扩展

一组数据上的多值过滤器(仅参考标题键)

HTML

<div *ngFor='let item of items | filtermulti: [{title:["mr","ms"]},{first:["john"]}]' >
 Hello {{item.first}} !
</div>

filterMultiple

args.forEach(function (filterobj) {
    console.log(filterobj)
    let filterkey = Object.keys(filterobj)[0];
    let filtervalue = filterobj[filterkey];
    myobjects.forEach(function (objectToFilter) {

      if (!filtervalue.some(x=>x==objectToFilter[filterkey]) && filtervalue != "") {
        // object didn't match a filter value so remove it from array via filter
        returnobjects = returnobjects.filter(obj => obj !== objectToFilter);
      }
    })
  });

另外，伙计们，如果您像我一样遇到解析器错误，请记住管道名称不应该包含破折号。

@Pipe({ name: 'arrayFilter' }) // I had 'array-filter'
export class ArrayFilterPipe implements PipeTransform {
    public transform(items: any[], value: string, props: string[]) { ... }
}

解析: *ngFor="让工作流| ***array-filter***: workflowFilter:['Name'];trackBy: trackWorkflow”

解析: *ngFor="let workflow of workflows | ***arrayFilter***: workflowFilter:['Name'];trackBy: trackWorkflow”

从:user3777549扩展

一组数据上的多值过滤器(仅参考标题键)

HTML

<div *ngFor='let item of items | filtermulti: [{title:["mr","ms"]},{first:["john"]}]' >
 Hello {{item.first}} !
</div>

filterMultiple

args.forEach(function (filterobj) {
    console.log(filterobj)
    let filterkey = Object.keys(filterobj)[0];
    let filtervalue = filterobj[filterkey];
    myobjects.forEach(function (objectToFilter) {

      if (!filtervalue.some(x=>x==objectToFilter[filterkey]) && filtervalue != "") {
        // object didn't match a filter value so remove it from array via filter
        returnobjects = returnobjects.filter(obj => obj !== objectToFilter);
      }
    })
  });

我使用Angular 2+中的Pipes来过滤对象数组。下面的参数需要多个过滤器参数，但如果适合您的需要，您可以只发送一个。下面是一个StackBlitz的例子。它将找到您想要筛选的键，然后根据您提供的值进行筛选。这实际上很简单，如果它听起来复杂，它不是，看看StackBlitz的例子。

这里是在*ngFor指令中调用的管道，

<div *ngFor='let item of items | filtermulti: [{title:"mr"},{last:"jacobs"}]' >
  Hello {{item.first}} !
</div>

这是烟斗，

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
  name: 'filtermulti'
})
export class FiltermultiPipe implements PipeTransform {
  transform(myobjects: Array<object>, args?: Array<object>): any {
    if (args && Array.isArray(myobjects)) {
      // copy all objects of original array into new array of objects
      var returnobjects = myobjects;
      // args are the compare oprators provided in the *ngFor directive
      args.forEach(function (filterobj) {
        let filterkey = Object.keys(filterobj)[0];
        let filtervalue = filterobj[filterkey];
        myobjects.forEach(function (objectToFilter) {
          if (objectToFilter[filterkey] != filtervalue && filtervalue != "") {
            // object didn't match a filter value so remove it from array via filter
            returnobjects = returnobjects.filter(obj => obj !== objectToFilter);
          }
        })
      });
      // return new array of objects to *ngFor directive
      return returnobjects;
    }
  }
}

这里是组件，包含要过滤的对象，

import { Component } from '@angular/core';
import { FiltermultiPipe } from './pipes/filtermulti.pipe';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'app';
  items = [{ title: "mr", first: "john", last: "jones" }
   ,{ title: "mr", first: "adrian", last: "jacobs" }
   ,{ title: "mr", first: "lou", last: "jones" }
   ,{ title: "ms", first: "linda", last: "hamilton" }
  ];
}

StackBlitz例子

GitHub示例:Fork这个示例的工作副本

*请注意，在Gunter提供的回答中，Gunter声明数组不再用作过滤器接口，但我搜索了他提供的链接，并没有发现任何与此声明相关的内容。同样，StackBlitz示例也显示了这段代码在Angular 6.1.9中正常工作。它将在Angular 2+中工作。

快乐编码:-)

因为β。参数不再作为数组传递给transform()方法，而是作为单独的参数:

{{ myData | date:'fullDate':'arg1':'arg2' }}


export class DatePipe implements PipeTransform {    
  transform(value:any, arg1:any, arg2:any):any {
        ...
}

https://github.com/angular/angular/blob/master/CHANGELOG.md#200-beta16-2016-04-26

管道现在接受可变数量的参数，而不是一个包含所有参数的数组。

你没有看到真正的管子。

{{ myData | date:'fullDate' }}

多个参数可以用“:”分隔。

{{ myData | myPipe:'arg1':'arg2':'arg3' }}

你也可以像这样连接管道:

{{ myData | date:'fullDate' | myPipe:'arg1':'arg2':'arg3' }}