I have component with input:
<my-input *ngIf='filter.type === checkType.INPUT_TEXT' [filter]='filter'></my-input>
export class MyInputComponent{
@Input() filter: any;
}
Template of MyInputComponent
<input name="name" [(ngModel)]="filter.input">
I want to set filter input inside and have influence on outer Component object.
How to pass filter object into MyInputComponent
to achieve 2 way data binding?
I want to achIeve something like [(ngModel)]="filter.value" but working between Components
Other posts here about 2-way data binding does'nt answer my questions.
Edit:
After using extends DefaultValueAccessor
in my MyInputComponent my parent component input disapears without any error.
import { Component, Input, OnInit, Provider, forwardRef } from '@angular/core';
import { FORM_DIRECTIVES, NG_VALUE_ACCESSOR, DefaultValueAccessor } from '@angular/common';
@Component({
moduleId: module.id,
selector: 'my-input',
directives: [FORM_DIRECTIVES],
host: { '(keyup)': 'doOnChange($event.target)' },
templateUrl: '<input name="name" [(ngModel)]="filter.input">'
})
export class MyInputComponent extends DefaultValueAccessor {
@Input() filter: any;
onChange = (_) => {};
onTouched = () => {};
writeValue(filter:any):void {
if (filter !== null) {
super.writeValue(filter.toString());
}
}
doOnChange(filter) {
this.onChange(filter);
}
}
const MY_VALUE_ACCESSOR = new Provider(
NG_VALUE_ACCESSOR, {useExisting: forwardRef(() => MyInputComponent), multi: true});
答案 0 :(得分:2)
您需要为此实现自定义值访问器。以下是此示例:
const MY_VALUE_ACCESSOR = new Provider(
NG_VALUE_ACCESSOR, {useExisting: forwardRef(() => MyInputComponent), multi: true});
@Component({
(...)
providers: [ MY_VALUE_ACCESSOR ]
})
export class MyInputComponent extends DefaultValueAccessor {
onChange = (_) => {};
onTouched = () => {};
writeValue(value:any):void {
if (value!=null) {
super.writeValue(value.toString());
}
}
// call when your internal input is updated
doOnChange(val) {
this.onChange(val);
}
}
有关详细信息,请参阅此文章(&#34;与NgModel兼容的组件&#34;部分):
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