我需要在表单中显示值以供以后编辑。总是向我显示此错误“ ERROR错误:control.registerOnChange不是函数”
我以此方式构建表单
form = this._fb.group({
createdAt:'',
customer: this._fb.group({
name: '',
lastname: '',
phone: '',
address: ''
}),
purchases: this._fb.array([ <-- this is the problematic,the others work well
this._fb.group({
product: this._fb.group({
name:'',
location:'',
categoryS:'',
price:''
}),
quantity: ''
})
])
});
并尝试显示它
<div formArrayName="purchases">
<label>Products:</label>
<div *ngFor="let product of form.controls.purchases.controls; let i = index">
<input [formControlName]="i" class="form-control"/>
</div>
</div>
有什么想法吗?
答案 0 :(得分:1)
我可以分享我的想法。
按如下所示更改模板:
<div *ngFor="let product of form.controls.purchases.controls; let i = index" [formGroupName]="i">
<div formGroupName="product">
<input formControlName="name" class="form-control"/>
<input formControlName="location" class="form-control"/>
...
</div>
</div>
还要确保您在编辑操作时正确填写了购买数组:
invoice.purchases.forEach(purchase => {
purchasesFormArray.push(this._fb.group({
product: this._fb.group(purchase.product),
quantity: purchase.quantity
}));
});
还检查了分叉的 Stackblitz Example