如何手动设置p-autocomplete的[field]属性并自定义表单存储值?
解决方法
模板配置
PrimeNG的p-autocomplete支持直接通过嵌套属性路径指定显示字段,不需要自定义函数。用optionLabel(新版推荐,旧版可用field)直接设置为"name.lang.field1"即可:
<p-autoComplete [suggestions]="complexObjects" [formControl]="inputFormControl" [dropdown]="true" [multiple]="multiple" optionLabel="name.lang.field1" (onSelect)="onSelect($event)" (onUnselect)="onUnselect($event)" ></p-autoComplete>
组件逻辑处理
要避免formControl存储整个对象,需要手动维护选中值数组并同步到表单控件:
import { FormControl } from '@angular/forms'; export class YourComponent { complexObjects = [ { "name": { "value": 4, "lang": { "language": { "value": "en" }, "field1": "Pakistan", "field2": "Pakistan", "field3": "Pakistan" } } }, { "name": { "value": 5, "lang": { "language": { "value": "en" }, "field1": "India", "field2": "India", "field3": "India" } } } ]; inputFormControl = new FormControl([]); selectedValues: number[] = []; multiple = true; onSelect(event: any) { // 防止重复添加选中值 if (!this.selectedValues.includes(event.name.value)) { this.selectedValues.push(event.name.value); this.inputFormControl.setValue([...this.selectedValues]); } } onUnselect(event: any) { this.selectedValues = this.selectedValues.filter(val => val !== event.name.value); this.inputFormControl.setValue([...this.selectedValues]); } }
核心要点
optionLabel支持点分隔的嵌套属性路径,组件会自动读取每个complexObjects元素的name.lang.field1作为显示文本,不需要编写getField()这类函数。- 多选模式下,组件默认会把整个选中对象存入表单控件,因此必须通过
onSelect和onUnselect事件手动提取你需要的name.value,维护成数组后同步给inputFormControl。 - 若为单选模式,只需在
onSelect中执行this.inputFormControl.setValue(event.name.value)即可。
内容的提问来源于stack exchange,提问作者sander
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