[英]How to access key values from array object in Angular with ngFor
每次單擊模塊擴展面板時,都會對API進行HTTP調用,以使特定模塊可以使用所有公司。
<mat-accordion *ngIf="modules">
<mat-expansion-panel *ngFor="let module of modules">
<mat-expansion-panel-header (click)="availableCompanies(module.module_name)">
<mat-panel-title>
{{module.module_name}}
</mat-panel-title>
</mat-expansion-panel-header>
HTTP響應(可用公司):
{
"message": "Retrieved companies available to module",
"data": [
{ "co_code": "123", "name": "Company A" },
{ "co_code": "456", "name": "Company B" },
{ "co_code": "789", "name": "Company C" }
]
}
在每個模塊擴展面板中,我想將可用的公司顯示為清單。 但我無法訪問對象的鍵值並迭代每個復選框。 這是我到目前為止所嘗試的:
<mat-list dense>
<mat-list-item *ngFor="let vertical of companies | keys">
<mat-checkbox *ngFor="let company of companies[vertical]">
{{company.name}}
</mat-checkbox>
</mat-list-item>
</mat-list>
我想也許我需要改變我使用鍵管或ngFor的方式? 任何幫助或想法都會很棒,謝謝:)
這是list.component.ts:
export class listComponent implements OnInit {
@Input() modules: Module[];
@Input() companies: Company[] = [];
constructor(
private rs: RecipientService, // has getAvailableCompanies http method
) { }
ngOnInit() {
}
availableCompanies(vertical: string) {
this.rs.getAvailableCompanies(this.recipient.email_address, vertical).subscribe(res => {
this.companies[vertical] = res;
console.log(res);
console.log(this.companies);
});
}
}
的console.log(RES):
(3) [
{ "co_code": "123", "name": "Company A" },
{ "co_code": "456", "name": "Company B" },
{ "co_code": "789", "name": "Company C" }
]
console.log(this.companies)跟蹤單擊的模塊/垂直。 如果擴展了兩個模塊(credit_cards和deposit),this.companies存儲module_names(鍵)和每個可用的公司數組:
[credit_cards: Array(3), deposits: Array(4)]
你試圖使用keyvalue
但語法錯誤,
除非您有自定義管道聲明,否則您需要使用keyvalue
而不僅僅是keys
。
<mat-list dense>
<mat-list-item *ngFor="let vertical of companies | keyvalue">
<mat-checkbox *ngFor="let company of companies[vertical]">
{{company.name}}
</mat-checkbox>
</mat-list-item>
</mat-list>
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