ngx分页中过滤器的制作

Question

在角7+电子4中，我使用ngx分页，但不能解决滤波器的问题.

我像在文档中那样做，但是我得到了错误未明错误:模板解析错误:管道'stringFilter‘无法找到

请帮帮我。提前感谢

Html-1：

<input
  type="text"
  name="search"
  class="search__input"
  placeholder="Search by Name..."
  [(ngModel)]="tableService.filter"> 

Html-2：

<ul class="table-body__list">
 <li *ngFor="let item of tableService.items | stringFilter: tableService.filter | paginate: config">
   <app-item [item]="item"></app-item>
 </li>
</ul>

<pagination-controls
  [maxSize]="maxSize"
  directionLinks="true"
  responsive="true"
  previousLabel="Previous page"
  nextLabel="Next page"
  (pageChange)="onPageChange($event)">        
</pagination-controls>

TypeScript：

import { Component, OnInit } from '@angular/core';
import { PaginationInstance } from 'ngx-pagination';
import { TableService } from '../../services/table.service';
@Component({
  selector: 'app-jobs-table',
  templateUrl: './jobs-table.component.html',
  styleUrls: ['./jobs-table.component.scss']
})
export class JobsTableComponent implements OnInit {
  filter = '';
  maxSize = 9;
  config: PaginationInstance = {
    itemsPerPage: 11,
    currentPage: 1
  };

  constructor(public tableService: TableService) { }

  ngOnInit() {
  }

  onPageChange(number: number) {
    this.config.currentPage = number;
  }

}

在TableService中：

filter = '';

Answer 1

如在github (搜索存储库中的筛选器)上所发现的那样。很明显，npx分页并没有任何标准的过滤管道。他们的医生..。次优

import {Pipe} from "@angular/core";

/**
 * A simple string filter, since Angular does not yet have a filter pipe built in.
 */
@Pipe({
    name: 'stringFilter'
})
export class StringFilterPipe {

    transform(value: string[], q: string) {
        if (!q || q === '') {
            return value;
        }
        return value.filter(item => -1 < item.toLowerCase().indexOf(q.toLowerCase()));
    }
}

有趣的评论顺便说一句:由于性能原因，用于过滤的角移除管。

Answer 2

只能使用筛选器更改stringFilter。

<ul class="table-body__list">
 <li *ngFor="let item of tableService.items | filter: tableService.filter | paginate: config">
   <app-item [item]="item"></app-item>
 </li>
</ul>