Angular 在被动表单中创建表单控制组
试图为被动表单创建html,但我总是出错 这是我的表格Angular 在被动表单中创建表单控制组,angular,reactive-forms,Angular,Reactive Forms,试图为被动表单创建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 {
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,我会尝试这样的东西
<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>
{{'Shared.WeekDay.+day.WeekDay | translate}
{{expertOperational.comment}
我出错了
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)
错误:formGroup需要一个formGroup实例。请把一个传进来。
例子:
在你们班:
this.myGroup=newformgroup({
名字:newformcontrol()
});
在Function.push../node_modules/@angular/forms/fesm5/forms.js.ReactiveErrors.missingFormException(forms.js:1443)
在FormGroupDirective.push../node_modules/@angular/forms/fesm5/forms.js.FormGroupDirective.\u checkFormPresent(forms.js:5414)
在FormGroupDirective.push../node_modules/@angular/forms/fesm5/forms.js.FormGroupDirective.ngOnChanges(forms.js:5237)
在checkAndUpdateDirectiveInline(core.js:22095)
在checkAndUpdateNodeLine(core.js:23363)
在checkAndUpdateNode(core.js:23325)
在debugCheckAndUpdateNode(core.js:23959)
在debugCheckDirectivesFn(core.js:23919)
at Object.eval[作为updateDirectives](ExpertOperationalComponent.html:6)
在Object.debugUpdateDirectives[作为updateDirectives](core.js:23911)
有人知道我哪里做错了吗?
谢谢你说你的HTML不好。您是否面临错误? 尝试此操作
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"
您应该声明一个FormGroup,如
formOperational:FormGroup代码>。在您的comont.ts
中尝试以下操作:
import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup} from '@angular/forms';
@Component({
selector: 'app-example',
templateUrl: './app-example.component.html',
styleUrls: ['./app-example.component.scss']
})
export class AppExampleComponent implements OnInit {
formOperational: FormGroup;
constructor(
private _formBuilder: FormBuilder,
) {}
}
您在哪里调用了buildForm函数()?您何时创建FormsOn ngInit,但我认为问题是我没有绑定正确的html,我不知道如何绑定?Put*ngIf=“formOperational”则只有在formI上存在时才会绑定我认为我的html不好:(