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我想在下拉列表中显示“内阁”数​​组中的项目。我已经尝试了下面的代码,但它不起作用。请帮忙。

组件.ts 文件:

    getProductDetail(id: string) {
    const x = this.productService.getProductById(id);
    x.snapshotChanges().subscribe(
    (product) => {
    const y = product.payload.toJSON() as Product;
    y.$key = id;
    this.cabinet = y['cabinet'];
    console.log("Cabinets",this.cabinet);
    return this.cabinet;
    }

组件.html 文件

    <div>
    Select Cabinet
    <select 
    [(ngModel)]="selectedCabinetType"
    >
    <option *ngFor="let item of cabinet">
    {{ item }}
    </option>
    </select>
    </div>
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