问题在于:
我有一个带有嵌套表单组的复杂表单,这里是一个"简化"结构如下:
<form [formGroup]="myForm">
<ion-list radio-group formControlName="listOptions">
<ion-item>
<ion-label>Option 1</ion-label>
<ion-radio value="1" (ionSelect)="myFunction($event)"></ion-radio>
</ion-item>
</ion-list>
</form>
角度方面,它应该看起来像这样(不正确/完整,但只是给出一个想法):
-> MyForm (formGroup)
-> Whatever01 (formControl - input)
-> Whatever02 (formControl - input)
-> WhateverGroup01 (formGroup)
-> Whatever03 (formControl - input)
-> Whatever04 (formControl - input)
-> WhateverArray01 (formArray)
-> WhateverGroup02 (formGroup)
-> Whatever05 (formControl - input)
-> WhateverGroup03 (formGroup)
-> Whatever06 (formControl - input)
-> WhateverGroup04 (formGroup)
-> Whatever07 (formControl - input)
-> ...
从root myForm项目到获取formArray的事情变得非常精细,但随后出现了问题....
所以,我无法访问&#34;无论05和#34; (和06但05不起作用......所以......)formControl将它绑定到模板!这是模板实际看起来的样子(在数组之前有意地跳过了部分),有趣的部分是[????] =&#34; ????&#34;,实际上这是问题。
this.myForm = this.fb.group({
whatever01: ['',Validators.compose([...])],
whatever02: ['',Validators.compose([...])],
whateverGroup01: this._formBuilder.group({
whatever03: ['',Validators.compose([...])],
whatever04: ['',Validators.compose([...])]
}),
whateverArray01: this._formBuilder.array([
this._formBuilder.group({
whatever05: ['',Validators.compose([...])],
whateverGroup03: this._formBuilder.group({
whatever06: ['',Validators.compose([...])]
})
}),
this._formBuilder.group({
whatever07: ['',Validators.compose([...])],
})
])
...
});
formArray中的formGroups具有完全相同的结构。
基本上,问题是我无法访问formGroups中的formControl ...
我尝试了几个解决方案,我使用[formGroupName],formGroupName(没有括号),[formGroup],formControlName,...但是无法弄清楚我必须使用什么才能将相应的formGroup / formControl绑定到数据!
我现在遇到这种错误:
<form [formGroup]="myForm" ...>
<!-- ...skipped... -->
<div formArrayName="whateverArray01" *ngFor="let item of myForm.controls.whateverGroup01.controls.whateverArray01.controls;let idx = index;" [formGroupName]="idx">
<div [????]="????">
<input formControlName="whatever05" ... />
<div [????]="????">
<input formControlName="whatever06" ... />
</div>
</div>
</div>
</form>
感谢您阅读/帮助
这是一个带有一些代码的plunker:
答案 0 :(得分:2)
表单的构建对我来说似乎是正确的。您在模板中遇到一些问题,FormArray
的迭代不正确,FormArray
不在FormGroup
WhateverGroup01
内,因此迭代应如下所示:< / p>
*ngFor="let ctrl of myForm.controls.whateverArray01.controls;
关于FormArray
的模板部分,它应如下所示:
<div *ngFor="let ctrl of myForm.controls.whateverArray01.controls; let i = index" [formGroupName]="i">
<input formControlName="whatever05" />
<div formGroupName="whateverGroup03">
<input formControlName="whatever06" />
</div>
</div>
那应该解决问题:)
这是一个
答案 1 :(得分:2)
首先,您的视图绑定错误:
[formGroupName]="whateverGroup02"
组件中没有whateverGroup02
属性。我们应该按如下方式传递字符串:
formGroupName="whateverGroup02"
然后,如果你建立组如:
this.fb.group({
x: 1,
y: {
z: 2
}
})
你会得到
FormGroup
-> FormControl with name `x` and value `1`
-> FormControl with name `y` and value `{ z: 2 }`
这意味着如果你想操纵嵌套的formGroups,你必须创建它们。 即。
let fGroups = data.map(rs => this.buildFormGroup(rs));
...
buildFormGroup(obj) {
let formGroup: { [id: string]: AbstractControl; } = {};
Object.keys(obj).forEach(key => {
formGroup[key] = typeof obj[key] === 'object' ?
this.buildFormGroup(obj[key]) :
new FormControl(obj[key]);
});
return this._formBuilder.group(formGroup);
}
<强> Plunker Example 强>