angular 2 : TypeError: this.form.updateValueAndValidity is not a function

angular 2 : TypeError: this.form.updateValueAndValidity is not a function

我升级到 rc.4 并正在尝试使用新的表单-api。这是我得到的:

"TypeError: this.form.updateValueAndValidity is not a function"

异常源自 "form_group_directive.js" 内的文件 angular:

FormGroupDirective.prototype.ngOnChanges = function (changes) {
    this._checkFormPresent();
    if (collection_1.StringMapWrapper.contains(changes, 'form')) {
        var sync = shared_1.composeValidators(this._validators);
        this.form.validator = validators_1.Validators.compose([this.form.validator, sync]);
        var async = shared_1.composeAsyncValidators(this._asyncValidators);
        console.log('from within angular:---------------------------------------------------------------------------------------------------');
        console.log(this.form);
        this.form.asyncValidator = validators_1.Validators.composeAsync([this.form.asyncValidator, async]);
        this.form.updateValueAndValidity({ onlySelf: true, emitEvent: false });
    }

console.log 语句的输出是 FormGroupDirective,它只是没有名为 updateValueAndValidity.

的方法

上述错误信息对任何人都有意义吗?

我认为您不能同时使用模板驱动方法和模型驱动方法。

所以我会使用以下任一方法:

<form  *ngIf="showForm" #userForm="ngForm"
   (ngSubmit)="userFormSubmit()">
</form>

或:

<form  *ngIf="showForm" [formGroup]="userForm"
   (ngSubmit)="userFormSubmit()">
</form>

其中 userForm 在组件 class 中用 FormBuilderFormControl 定义。我认为这种方法正是您所需要的...