首先,我刚刚从 Angular 2 开始,我正在尝试构建一个嵌套表单并验证它。
这是我的 ts 文件的一部分:
ngOnInit() {
this.myForm = this.formBuilder.group({
projects: this.formBuilder.array([
this.initProjects()
])
});
}
initProjects(): any {
return this.formBuilder.group({
name: ['', [Validators.required, Validators.minLength(3)]],
some_array: this.formBuilder.array([
this.formBuilder.group({
name: ['', Validators.required],
attr: ['', Validators.required],
some_id: [1, Validators.required]
})
])
});
}
addProject(): void {
const control = < FormArray > this.myForm.controls['projects'];
control.push(this.initProjects());
}
View:
<form [formGroup]="myForm" novalidate (ngSubmit)="onSubmit(myForm)">
<div formArrayName="projects">
<div *ngFor="let project of myForm.controls.projects.controls; let i = index">
<div [formGroupName]="i">
<md-input placeholder="Name" formControlName="name"></md-input>
</div>
<div *ngFor="let some_obj of project.controls.some_array.controls; let x = index">
<div [formGroupName]="x">
<div>
<md-input placeholder="Nome" formControlName="controls.some_array.controls.name"></md-input>
<small *ngIf="!some_obj.controls.name.valid">
Nome é requerido
</small>
</div>
<md-input type="number" placeholder="Cost" formControlName="controls.some_array.controls.attr" required></md-input>
</div>
</div>
</div>
</div>
<button type="submit" md-raised-button color="primary" [disabled]="!myForm.valid">Submit</button>
</form>
<pre>form value: <br>{{myForm.value | json}}</pre>
表单值的输出:
form value:
{
"projects": [
{
"name": "",
"some_array": [
{
"name": "",
"attr": "",
"some_id": 1
}
]
},
{
"name": "",
"some_array": [
{
"name": "",
"attr": "",
"some_id": 1
}
]
}
]
}
好吧,正如您所看到的,我有一些称为项目的数组,每个数组内有 1 个数组。
所以问题是我无法验证 some_array 数组的每个控件。
实际上我收到以下错误:
原始异常:无法找到路径为:'projects -> 0 ->controls.some_array.controls.name 的控件
PS:我已经尝试将其放在div中,如下所示:
但我也遇到了一个错误:
无法找到路径控制:'projects -> some_array'
提前致谢。任何帮助,将不胜感激。