FormArray的FormControl中的唯一值验证 [英] Unique value validation in FormControl of FormArray
问题描述
我正在开发Job表单,用户可以在Job表单中输入自己的爱好.我已经在hobbyName formcontrol上应用了所需的验证,但是如果有多个兴趣爱好,我该如何验证兴趣爱好名称,该名称应该是唯一的.
I am developing Job form where user can enter his hobbies in the Job Form. I have applied required validation on hobbyName formcontrol, but how can I validate hobby name which should be unique if there is more than one hobby.
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
below is my Html code
<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都将添加到FormArray中.
whenever user click on add button, at that time new FormGroup will be added in the FormArray.
我无法弄清楚如何验证嗜好名称,该名称应该是唯一的?
I am not able to figure out how can I validate the hobby name, which should be unique?
请指导.
推荐答案
好,您可以使用RxwebValidators
包,我已经实现了它的工作.在我的代码下共享.
Ok,you can use RxwebValidators
package,I have implemented it its working.Shared below my code.
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:)
I hope it will be helpful :)
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