问在Angular 2中，反应形式不使用ngModel和formArrayName更新值

EN

<form [formGroup]="myForm" novalidate (ngSubmit)="onSubmit()">
<p-dataTable [value]="dataMenu" [editable]="true" formArrayName="menu">
    <p-column field="menu" header="Menu"></p-column>
    <p-column field="price" header="Price" [editable]="true">
        <template let-row="rowData" let-i="rowIndex" pTemplate="body">
            {{row.price}}
        </template>
        <template let-row="rowData" let-i="rowIndex" pTemplate="editor">
            <input type="number" pInputText [(ngModel)]="row.price" name="test" [ngModelOptions]="{standalone: true}"/>
        </template>
    </p-column>
</p-dataTable>

this.myForm = this.fb.group( { //fb is FormBuilder
    menu: this.fb.array([]),
});

this.setDataMenu(this.dataMenu);
...
setDataMenu( menu: Array<any> ) {
    const control = <FormArray>this.myForm.controls['menu'];
    for ( let m of menu ) {
        control.push( this.fb.control(m, validatePrices) );
    }
}

function validatePrices( c: FormControl ) {

    return ( c.value != null && c.value.price) ? null : {
        validatePrices: {
            valid: false
        }
    };
}