在过滤管道上使用多个字段| Angular 4 [英] Using multiple fields on Filter Pipe | Angular 4
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问题描述
我想知道如何使用Pipe来使用多个输入字段来过滤json对象,到目前为止我的代码只有一个字段按名称过滤:
I was wondering how would I use Pipe to filter a json object using multiple inputs fields, here's my code so far with only one field filtering by name:
TS
members = [
{name:'Carl', country:"Brazil"},
{name:'John', country:"United States"},
{name:'Madhu', country:"India"}
]
PIPE.TS
transform(members: any, term: any): any {
//check if search term is undefined
if (term === undefined) return members;
//return updated members array
return members.filter(function(member){
return member.name.toLowerCase().includes(term.toLowerCase());
})
}
HTML
<input type="text" [(ngModel)]="term" name="any"/>
<li *ngFor="let member of members | filter:term">
<h3>{{member.name}}</h3>
<span>{{member.country}}</span>
</li>
我想添加一个额外的输入字段来搜索国家。
I want to add an extra input field where it will search for the country.
编辑:
使用以下代码:
TS COMPONENT
fields: any = { name: "", country: "" };
filters: any = { name: "", country: "" };
updateFilters(): void {
this.filters = Object.assign({}, this.fields);
console.log(this.filters);
}
HTML
<input type="text" name="any" [(ngModel)] = "fields.name" (ngModelChange)="updateFilters()"/>
<input type="text" name="anyy" [(ngModel)] = "fields.country" (ngModelChange)="updateFilters()"/>
<li *ngFor="let member of members | filter: filters">
<div style="border-bottom: 1px solid; border-color:rgba(0,0,0,0.3);margin-bottom:15px">
<h3>{{member.name}}</h3>
<span>{{member.country}}</span>
</div>
</li>
PIPE.TS
transform(members: any, filters: any): any {
return members.filter(item => {
return (item.name.toLowerCase().indexOf(filters.name.toLowerCase()) >= 0 && item.country.toLowerCase().indexOf(filters.country.toLowerCase()) >= 0);
});
}
推荐答案
您可以传递一个对象多个字段:
You can pass an object instead of multiple fields:
<li *ngFor="let member of members | filter: filters">
在您的组件类中:
filters: any = { name: "ex", country: "a country" };
更新:
<input type="text" [(ngModel)] = "fields.name" (ngModelChange)="updateFilters()"/>
<input type="text" [(ngModel)] = "fields.country" (ngModelChange)="updateFilters()"/>
在您的组件中:
fields: any = { name: "", country: "" };
filters: any = { name: "", country: "" };
updateFilters(): void {
this.filters = Object.assign({}, this.fields);
}
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