我有三个组成部分:
consent
托管一个FormGroup
,其中包含两个FormArray
。
consentForm = this.fb.group({
identityScopes: this.fb.array([]),
resourceScopes: this.fb.array([])
});
get identityScopes(): FormArray {
return this.consentForm.get("identityScopes") as FormArray;
}
get resourceScopes(): FormArray {
return this.consentForm.get("resourceScopes") as FormArray;
}
这是consent
组件模板:
<form *ngIf="configuration" [formGroup]="consentForm">
<app-consent-scope-list class="scope-list"
[list]="configuration.identityScopes"
[title]="'Personal Information'"
[group]="consentForm"
[array]="identityScopes">
</app-consent-scope-list>
<app-consent-scope-list class="scope-list"
[list]="configuration.resourceScopes"
[title]="'Application Access'"
[group]="consentForm"
[array]="resourceScopes">
</app-consent-scope-list>
</form>
我正在按照同意信息https://stackoverflow.com/a/46452897/2555957的指示,将FormGroup
从同意书中传递到consent-scope-list
组件中。
consent-scope-item
组件声明:
export class ConsentScopeListComponent implements OnInit {
@Input() title: string;
@Input() list: Array<Scope>;
@Input() group: FormGroup;
@Input() array: FormArray;
constructor(private readonly fb: FormBuilder) { }
ngOnInit(): void {
for (let i = 0; i < this.list.length; i++) {
const item = this.list[i];
this.array.push(this.fb.control(item.checked));
}
}
}
consent-scope-list
的模板:
<div class="panel panel-bordered panel-primary" *ngIf="list && list.length" [formGroup]="group">
<div class="panel-heading">
<h3 class="panel-title">{{title}}</h3>
</div>
<div class="panel-body" [formArrayName]="array">
<app-consent-scope-item *ngFor="let entry of list; index as i; first as isFirst; last as isLast"
[item]="entry"
[isFirst]="isFirst"
[isLast]="isLast"
[index]="i">
</app-consent-scope-item>
</div>
</div>
最后是consent-scope-item
组件声明:
export class ConsentScopeItemComponent {
@Input() item: Scope;
@Input() formControl: AbstractControl;
@Input() isFirst: boolean;
@Input() isLast: boolean;
@Input() index: number;
}
还有consent-scope-item
的模板:
<div class="checkbox">
<input class="magic-checkbox"
type="checkbox"
[value]="item.name"
[checked]="item.checked"
[disabled]="item.required"
[formControlName]="index"
[id]="'consent_' + index + item.name + item.displayName"/>
<label [for]="'consent_' + index + item.name + item.displayName">{{item.displayName}}
</label>
</div>
我在consent-scope-list
中遇到运行时错误,说它找不到formGroup:
ERROR Error: Cannot find control with name: '[object Object]'
at _throwError (forms.js:1790)
at setUpFormContainer (forms.js:1772)
at FormGroupDirective.push../node_modules/@angular/forms/fesm5/forms.js.FormGroupDirective.addFormArray (forms.js:4716)
at FormArrayName.push../node_modules/@angular/forms/fesm5/forms.js.FormArrayName.ngOnInit (forms.js:4956)
at checkAndUpdateDirectiveInline (core.js:18620)
at checkAndUpdateNodeInline (core.js:19884)
at checkAndUpdateNode (core.js:19846)
at debugCheckAndUpdateNode (core.js:20480)
at debugCheckDirectivesFn (core.js:20440)
at Object.eval [as updateDirectives] (ConsentScopeListComponent.html:5)
答案 0 :(得分:0)
我刚刚尝试重现您提出的错误并尝试解决它,我能够解决它,请您看看https://stackblitz.com/edit/form-array-subcomponents