尝试为响应式表单创建 html,但我总是出错
这是我的表格
private buildForm(): void {
this.formOperational = this.formBuilder.group({
comment: [this.expertOperational.comment],
workingDays: new FormArray([])
});
}
private createWorkignDays(): void {
this.operational.workingDay.forEach((day: WorkingDay) => {
this.workHoursControls.push(
this.formBuilder.group({
weekDay: [day],
operationalAM: this.formBuilder.group({
fixed: [day.operationalAM.fixed],
startTime: [day.operationalAM.startTime],
endTime: [day.operationalAM.endTime]
}),
operationalPM: this.formBuilder.group({
fixed: [day.operationalAM.fixed],
startTime: [day.operationalAM.startTime],
endTime: [day.operationalAM.endTime]
})
})
);
});
}
当我使用 HTML 时,我会尝试这样的操作
<form [formGroup]="formOperational">
<div class="row pb-1" *ngFor="let day of formOperational.get('workingDays').controls; let i = index;">
<div class="col-lg-2 col-sm-2 col-md-2 justify-content-center align-self-center">
{{'Shared.WeekDay.' + day.weekDay | translate }}
</div>
<div class="row" [formGroup]="i">
<div class="text-center col">
<input type="checkbox" formControlName="fixed">
</div>
</div>
<div class="col">
<input class="form-control text-center width-70" formControlName="startTime" />
</div>
<div class="col">
<input class="form-control text-center width-70" formControlName="endTime" />
</div>
</div>
<div class="form-group">
<textarea class="form-control rounded-0" formControlName="comment"
rows="11">{{expertOperational.comment}}</textarea>
</div>
</form>
我遇到了错误
ERROR Error: formGroup expects a FormGroup instance. Please pass one in.
Example:
<div [formGroup]="myGroup">
<input formControlName="firstName">
</div>
In your class:
this.myGroup = new FormGroup({
firstName: new FormControl()
});
at Function.push../node_modules/@angular/forms/fesm5/forms.js.ReactiveErrors.missingFormException (forms.js:1443)
at FormGroupDirective.push../node_modules/@angular/forms/fesm5/forms.js.FormGroupDirective._checkFormPresent (forms.js:5414)
at FormGroupDirective.push../node_modules/@angular/forms/fesm5/forms.js.FormGroupDirective.ngOnChanges (forms.js:5237)
at checkAndUpdateDirectiveInline (core.js:22095)
at checkAndUpdateNodeInline (core.js:23363)
at checkAndUpdateNode (core.js:23325)
at debugCheckAndUpdateNode (core.js:23959)
at debugCheckDirectivesFn (core.js:23919)
at Object.eval [as updateDirectives] (ExpertOperationalComponent.html:6)
at Object.debugUpdateDirectives [as updateDirectives] (core.js:23911)
有人知道我哪里做错了吗? 谢谢
最佳答案
你说你的HTML不好。你在那里遇到错误吗?
试试这个
删除
*ngFor="let day of formOperational.get('workingDays').controls; let i = index;"
添加
设置一个getter
get controls() {
return (this.formOperational.get('workingDays') as FormArray).controls;
}
然后在模板中
*ngFor="let day of controls; let i = index"
关于angular - 以 react 形式创建表单控制组,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59454216/