Angular 4过滤器搜索自定义管道 [英] Angular 4 Filter Search Custom Pipe
问题描述
所以我正在尝试构建一个自定义管道来对ngFor循环中的多个值进行搜索过滤。我已经花了好几个小时才找到一个好的工作示例，其中大多数是基于以前的版本，似乎没有用。所以我正在构建Pipe并使用控制台为我提供值。但是，我似乎无法显示输入文本。
So I am trying to build a custom pipe to do a search filter of multiple values in a ngFor loop. I have looked for a number of hours for a good working example, and most of them are based on previous builds and don't seem to work. So I was building the Pipe and using the console to give me the values. However, I cannot seem to get the input text to show up.
以下是我寻找工作示例的地方：
Here are the previous places I have looked to find working examples:
http://jilles.me/ng-filter-in -angular2-pipes /
https： //plnkr.co/edit/vRvnNUULmBpkbLUYk4uw?p=preview
https://www.youtube.com/results?sear ch_query =过滤器+搜索+角度+2
https://www.youtube.com/watch?v=UgMhQpkjCFg
以下是我目前的代码：
component.html
component.html
<input type="text" class="form-control" placeholder="Search" ngModel="query" id="listSearch" #LockFilter>
<div class="panel panel-default col-xs-12 col-sm-11" *ngFor="let lock of locked | LockFilter: query">
<input type="checkbox" ngModel="lock.checked" (change)="openModal($event, lock)" class="check" id="{{lock.ID}}">
<label for="{{lock.ID}}" class="check-label"></label>
<h3 class="card-text name" ngModel="lock.name">{{lock.User}}</h3>
<h3 class="card-text auth" ngModel="lock.auth">{{lock.AuthID}}</h3>
<h3 class="card-text form" ngModel="lock.form">{{lock.FormName}}</h3>
<h3 class="card-text win" ngModel="lock.win">{{lock.WinHandle}}</h3>
</div>
pipe.ts
import { Pipe, PipeTransform } from '@angular/core';
@Pipe({
name: 'LockFilter'
})
export class LockFilterPipe implements PipeTransform {
transform(locked: any, query: string): any {
console.log(locked); //this shows in the console
console.log(query); //this does not show anything in the console when typing
if(!query) {
return locked;
}
return locked.filter((lock) => {
return lock.User.toLowerCase().match(query.toLowerCase());
});
}
}
我已将管道导入模块。
我对Angular 4还有点新意，我正试图找出如何使这项工作。无论如何，谢谢你的帮助！
I am still a little newer to Angular 4 and am trying to figure out how to make this work. Anyways thanks for your help!
我想我需要更加具体。我已经在JS中构建了一个不过滤所有选项的过滤搜索，这正是我想要做的。不只是过滤用户名。我正在过滤所有4个数据。我选择了一个Pipe，因为这是Angular建议你做的，因为他们最初在AngularJS中使用它们。我只是想尝试基本上重新创建我们在AngularJS中为了性能而移除的过滤管道。我找到的所有选项都不起作用，或来自以前的Angular版本。
I guess I will need to be more specific. I already built out a filter search in JS that does not filter all of the options, which is what I am trying to do. Not just filter the User Name. I am filtering all 4 pieces of data. I chose a Pipe as this was what Angular suggests you do as they originally used them in AngularJS. I am just trying to essentially recreate the filter pipe we had in AngularJS that they removed for performance. All options I have found don't work, or are from previous builds of Angular.
如果您需要我的代码中的任何其他内容，请告诉我。
If you need anything else from my code let me know.
推荐答案
我必须在我的本地实现搜索功能，这里更新了你的代码。请这样做。
I have to implement search functionality in my local and Here is Updated your code. please do this way.
这是我必须更新的代码。
Here is the code that I have to update.
目录结构
app/
_pipe/
search/
search.pipe.ts
search.pipe.spec.ts
app/
app.component.css
app.component.html
app.component.ts
app.module.ts
app.component.spec.ts
命令运行创建管道
ng g pipe search
component.html
<input type="text" class="form-control" placeholder="Search" [(ngModel)]="query" id="listSearch">
<div class="panel panel-default col-xs-12 col-sm-11" *ngFor="let lock of locked | LockFilter: query">
<input type="checkbox" (change)="openModal($event, lock)" class="check" id="{{lock.ID}}">
<label [for]="lock.ID" class="check-label"></label>
<h3 class="card-text name">{{lock.User}}</h3>
<h3 class="card-text auth">{{lock.AuthID}}</h3>
<h3 class="card-text form">{{lock.FormName}}</h3>
<h3 class="card-text win">{{lock.WinHandle}}</h3>
</div>
component.js
注意：在此文件中，我必须使用虚拟记录进行实现和测试。
Note: In this file, i have to use dummy records for implementation and testing purpose.
import { Component, OnInit } from '@angular/core';
import { FormsModule } from '@angular/forms';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit{
public search:any = '';
locked: any[] = [];
constructor(){}
ngOnInit(){
this.locked = [
{ID: 1, User: 'Agustin', AuthID: '68114', FormName: 'Fellman', WinHandle: 'Oak Way'},
{ID: 2, User: 'Alden', AuthID: '98101', FormName: 'Raccoon Run', WinHandle: 'Newsome'},
{ID: 3, User: 'Ramon', AuthID: '28586', FormName: 'Yorkshire Circle', WinHandle: 'Dennis'},
{ID: 4, User: 'Elbert', AuthID: '91775', FormName: 'Lee', WinHandle: 'Middleville Road'},
]
}
}
module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { SearchPipe } from './_pipe/search/search.pipe';
@NgModule({
declarations: [
AppComponent,
SearchPipe
],
imports: [
BrowserModule,
FormsModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
pipe.ts
import { Pipe, PipeTransform } from '@angular/core';
@Pipe({
name: 'LockFilter'
})
export class SearchPipe implements PipeTransform {
transform(value: any, args?: any): any {
if(!value)return null;
if(!args)return value;
args = args.toLowerCase();
return value.filter(function(item){
return JSON.stringify(item).toLowerCase().includes(args);
});
}
}
我希望你得到管道功能，这将是帮助你。
I hope you are getting the pipe functionality and this will help you.
这篇关于Angular 4过滤器搜索自定义管道的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
