在Angular 1中,如上所述here有过滤属性和ng-repeat
。
但在Angular 2中,有一个名为" pipe" 的新功能。我已经使用过管道,但我仍然无法搜索Angular 1版本中的所有属性。
然而,它适用于任何1个属性,但对于整个数组,它不起作用。
当我搜索某些内容时出现以下错误。
错误类型错误:无法读取属性'包含'为null 在http://localhost:8100/build/main.js:118751:76 在Array.some(本机) 在http://localhost:8100/build/main.js:118751:42 at Array.filter(native) 在FilterPipe.transform(http://localhost:8100/build/main.js:118750:26) at checkAndUpdatePureExpressionInline(http://localhost:8100/build/main.js:11519:38) at checkAndUpdateNodeInline(http://localhost:8100/build/main.js:12374:17) at checkAndUpdateNode(http://localhost:8100/build/main.js:12336:16) 在debugCheckAndUpdateNode(http://localhost:8100/build/main.js:12965:59) 在debugCheckDirectivesFn(http://localhost:8100/build/main.js:12906:13) 在Object.eval [as updateDirectives](ng:///AppModule/Orders.ngfactory.js:628:46) at Object.debugUpdateDirectives [as updateDirectives](http://localhost:8100/build/main.js:12891:21) 在checkAndUpdateView(http://localhost:8100/build/main.js:12303:14) 在callViewAction(http://localhost:8100/build/main.js:12618:17) 在execComponentViewsAction(http://localhost:8100/build/main.js:12564:13)
ERROR CONTEXT DebugContext_ {view:Object,nodeIndex:43,nodeDef:Object,elDef:Object,elView:Object}组件: (...)componentRenderElement:(...)context:(...)elDef: ObjectbindingFlags:2bindingIndex:6bindings:Array(1)childCount: 1childFlags:73728childMatchedQueries:0directChildFlags: 73728element:Objectflags:1index:42matchedQueries: ObjectmatchedQueryIds:0ngContent:nullngContentIndex:0outputIndex: 3outputs:Array(0)parent:Objectprovider:nullquery:nullreferences: ObjectrenderParent:Objecttext:null__proto __:ObjectelOrCompView: (...)elView:Objectinjector:(...)nodeDef:ObjectnodeIndex: 43providerTokens :( ...)引用:(...)renderNode:(...)view: Object__proto__:Object
以下是我的参考代码:
1)FilterPipe.ts
import { Pipe, PipeTransform, Injectable } from '@angular/core';
@Pipe({
name: 'filter'
})
@Injectable()
export class FilterPipe implements PipeTransform {
transform(items: any, term: any): any {
if (term) {
// THIS IS WORKING BUT FOR ONLY order_id PROPERTY
// return items.filter(function (item) {
// return item.order_id.toLowerCase().includes(term.toLowerCase());
// });
// THIS IS NOT WORKING
return items.filter(item => {
return Object.keys(item).some(k => item[k].includes(term.toLowerCase()));
});
}
return items;
}
}
2)Orders.html
<ion-header style="direction: ltr;">
<ion-navbar>
<ion-buttons left>
<button ion-button icon-only (click)="logout()">
<ion-icon name="log-out"></ion-icon>
</button>
</ion-buttons>
<ion-title>הזמנה</ion-title>
<ion-buttons start>
<button ion-button icon-only (click)="getOrders()">
<ion-icon name="refresh"></ion-icon>
</button>
</ion-buttons>
<ion-buttons end>
<button ion-button icon-only (click)="showFilterBar()">
<ion-icon name="search"></ion-icon>
</button>
</ion-buttons>
</ion-navbar>
</ion-header>
<ion-content>
<ul class="list" *ngFor="let order of orders | filter : Search.value">
<li class="item {{order.color}}" (click)="gotoorderdetails(order)">
<div style="float:left;">
{{order.start_date}}<br/>
</div>
<b>{{order.order_id}} </b> צ - {{order.total_staff}} ימ- {{order.number_of_days}}<br/><br/> {{order.full_name}}
<br/>
<div style="float:left;">
{{order.managers}}<br/>
</div>
<span *ngIf="order.event_location"> {{order.event_location}}<br/></span>
</li>
</ul>
</ion-content>
<ion-footer>
<ion-searchbar #Search (keyup)="0"></ion-searchbar>
</ion-footer>
如何在离子2中使用ionic filter bar。
答案 0 :(得分:2)
感谢JB Nizet的回答。
以下是我工作的更新代码。
import { Pipe, PipeTransform, Injectable } from '@angular/core';
@Pipe({
name: 'filter'
})
@Injectable()
export class FilterPipe implements PipeTransform {
transform(items: any, term: any): any {
if (term) {
return items.filter(item => {
return Object.keys(item).some(
k => {
if (item[k] != null && item[k] != undefined && typeof item[k] == 'string')
return item[k].includes(term.toLowerCase());
}
);
});
}
return items;
}
}