当我们尝试使用formGroup时,我们会尝试一些错误。 我需要一些有关表格组的解释。 我想用数据创建一个表单组。 数据需要逐行显示。 我们使用角度8 当我运行它时,出现此错误:
用于表单控件的无值访问器,其路径为:'rowDetails-> 0->否'
我有这个Componnent的构造函数:
constructor(
public fb: FormBuilder
) {
this.summaryForm = this.fb.group({
rowDetails: this.fb.array([])
})
}
我有这个Componnent的控制者:
ngOnInit() {
this.productList = (this.selectedReceiptBatch.incomeSummary as SaleSummary).sales;
this.summaryForm = this.fb.group({
rowDetails: this.fb.array(
this.productList.map(x=> this.fb.group({
'no': x.product.code,
'desc': x.product.productClass,
'numberx': [x.number.x],
'numbery': x.number.y,
'amountz': x.number.z,
'reference': [x.reference]
})
))
});
console.log(this.summaryForm);
this.formControlAvailable = true;
}
HTML:
<div *ngIf="formControlAvailable">
<div>
<div [formGroup]="summaryForm">
<div formArrayName="rowDetails">
<div *ngFor="let row of summaryForm.controls.rowDetails.controls; let index = index">
<div [formGroupName]="index">
<div>
<span formControlName="no" >{{row.value.no}}</span>
</div>
<div>
<span *ngIf="row?.product?.code" formControlName="desc" >
{{row.value.desc}}
</span>
<div *ngIf="!row?.product?.code" ngbDropdown class="d-inline-block">
<mat-form-field>
<mat-label>Select an option</mat-label>
<mat-select [(value)]="row.product.code" formControlName="desc" >
<mat-option *ngFor="let product of cashableProducts" [value]="product.code">
{{product.code}}
</mat-option>
</mat-select>
</mat-form-field>
</div>
</div>
<div >
<input type="number" [value]="row.amount.net"
(change)="row.amount.net = parseNumber($event.target.value);calculate()"
formControlName='numberx' />
</div>
<div >
<span formControlName='numbery' >{{ row.value.numbery }}$</span>
</div>
<div >
<span formControlName='numberz' >{{ row.value.numberz }}$</span>
</div>
<div >
<input formControlName='reference' type="text" class="form-control" minlength="0" [(ngModel)]="row.reference" />
</div>
</div>
</div>
</div>
</div>
</div>
</div>
答案 0 :(得分:1)
您只能将formControlName
伪指令放在实现接口值访问器接口的输入元素,select,textarea或组件上
更改此
<span formControlName="no" >{{row.value.no}}</span>
输入这样的元素
<input type="text" formControlName="no" >
如果您只想显示no
值
{{row.value?.no}}