我正在开发工作表,用户可以在工作表中输入自己的爱好。我已经在hobbyName formcontrol上应用了所需的验证,但是如果有多个以上的兴趣爱好,该如何验证唯一的兴趣爱好名称。
下面是我的ts代码
import { Component,OnInit } from '@angular/core';
import { FormGroup,FormArray,FormBuilder,Validators } from "@angular/forms"
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: [ './app.component.css' ]
})
export class AppComponent implements OnInit {
jobForm:FormGroup
constructor(private jobfb:FormBuilder){}
ngOnInit(){
this.jobForm = this.jobfb.group({
hobbies:this.jobfb.array([
this.createHobbyFormGroup()
])
})
}
addHobby(){
let hobbies = this.jobForm.controls.hobbies as FormArray;
hobbies.push(this.createHobbyFormGroup());
}
createHobbyFormGroup(){
return this.jobfb.group({
hobbyName:['',Validators.required]
});
}
}
下面是我的HTML代码
<button (click)="addHobby()">Add Hobby</button>
<table>
<tr [formGroup]="hobbyFG" *ngFor="let hobbyFG of jobForm.controls.hobbies.controls;">
<input formControlName="hobbyName"/>
</tr>
</table>
<button [disabled]="!jobForm.valid">Submit</button>
每当用户单击添加按钮时,新的FormGroup都会添加到FormArray中。
我无法弄清楚如何验证爱好名称,该名称应该唯一?
请指导。
答案 0 :(得分:1)
好的,您可以使用RxwebValidators
包,我已经实现了它的工作。在我的代码下面共享。
在ts文件中(在应用模块中导入)
import { RxwebValidators } from '@rxweb/reactive-form-validators';
export class ProductComponent implements OnInit ,Product {
public complexForm: FormGroup = this.builder.group({
'firstName' : ['',[Validators.required,Validators.pattern('^[a-zA-Z0-9]+$')]],
'lastName': ['', Validators.minLength(5)],
hobbies:this.builder.array([
this.createHobbyFormGroup()
]),
'gender' : 'Female',
'hiking' : false,
'running' : false,
'swimming' : false
});
addHobby(){
let hobbies = this.complexForm.controls.hobbies as FormArray;
hobbies.push(this.createHobbyFormGroup());
}
createHobbyFormGroup(){
return this.builder.group({
hobbyName:['',RxwebValidators.unique()]
});
}
}
以HTML格式
<table class="table">
<thead>
<tr>
<th scope="col">#</th>
<th scope="col">hobby Name</th>
</tr>
</thead>
<tbody>
<tr [formGroup]="skillGroup" *ngFor="let skillGroup of complexForm.controls.hobbies.controls;let i = index;">
<th scope="row">{{i+ 1}}</th>
<td><input type="text" formControlName="hobbyName" class="form-control" />
</tr>
</tbody>
</table>
<div class="form-group">
<label>hobbies</label>
<input class="form-control" type="text" [formControl]="complexForm.controls['hobbies']">
</div>
我希望这会有所帮助:)