这是我的组件文件：
import { Router, ActivatedRoute } from '@angular/router';
import { Component, OnInit } from '@angular/core';
import { CategoriesService } from 'src/app/categories.service';
import { ProductService } from 'src/app/product.service';
import 'rxjs/add/operator/take';
@Component({
selector: 'app-product-forms',
templateUrl: './product-forms.component.html',
styleUrls: ['./product-forms.component.css']
})
export class ProductFormsComponent implements OnInit {
categories$;
product: {};
constructor(categoryservice: CategoriesService , private productservice: ProductService , private router: Router,
private route: ActivatedRoute) {
this.categories$ = categoryservice.getcategories();
let id = this.route.snapshot.paramMap.get('id');
if (id) { this.productservice.get(id).take(1).subscribe(p => this.product = p); }
}
save(product) {
this.productservice.create(product);
this.router.navigate(['/admin/products']);
}
ngOnInit() {
}
}
这是我的html文件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title >Title</title>
</head>
</html>
<div class="row">
<div class="col-md-6">
<form #f="ngForm" (ngSubmit)="save(f.value)">
<div class="form-group">
<label for="title">Title</label>
<input #title="ngModel" [(ngModel)]="product.title" name="title" id="title" type="text" class="form-control" required>
***<!-- ERROR : Identifier 'title' is not defined. '{}' does not contain such a member -->***
<div class="alert alert-danger" *ngIf="title.touched && title.invalid">
Title is required
</div>
</div>
<div class="form-group">
<label for="price">Price</label>
<div class="input-group-prepend">
<span class="input-group-text">$</span>
<input #price="ngModel" [(ngModel)]="product.price" name="price" id="price" type="number" class="form-control" required [min]="0">
<!--ERROR : Identifier 'price' is not defined. '{}' does not contain such a member -->
</div>
<div class="alert alert-danger" *ngIf="price.touched && price.invalid">
<div *ngIf="price.errors.required">Price is required</div>
<div *ngIf="price.errors.min">Price must be 0 or higher than zero</div>
</div>
</div>
<div class="form-group">
<label for="category">Cateogary</label>
<select #category="ngModel" [(ngModel)]="product.category" name="category" id="category" class="form-control" required>
<!--ERROR : Identifier 'category' is not defined. '{}' does not contain such a member -->
<option value=""></option>
<option *ngFor="let c of categories$ | async" [value]="c.$key">
{{ c.name }}
</option>
</select>
<div class="alert alert-danger" *ngIf="category.touched && category.invalid">
Category is required
</div>
</div>
<div class="form-group">
<label for="imageurl">Image Url</label>
<input #imageUrl="ngModel" [(ngModel)]="product.imageurl" name="imageUrl" id="imageurl" type="text" class="form-control" required url>
<!--ERROR : Identifier 'imageurl' is not defined. '{}' does not contain such a member -->
<div class="alert alert-danger" *ngIf="imageUrl.touched && imageUrl.invalid">
<div *ngIf="imageUrl.errors.required">ImageUrl is required</div>
<div *ngIf="imageUrl.errors.url">ImageUrl is required</div>
</div>
</div>
<button class="btn btn-primary">Save</button>
</form>
</div>
<div class="col-md-6">
<div class="card" style="width: 18rem;">
<img [src]="product.imageUrl" class="card-img-top" alt="..." *ngIf="product.imageUrl">
<div class="card-body">
<h5 class="card-title"> {{product.title}} </h5>
<!-- ERROR : Identifier 'title' is not defined. '{}' does not contain such a member -->
<p class="card-text"> {{product.price | currency:'USD':true}} </p>
</div>
</div>
</div>
</div>
[每当我部署项目时，都会出现以下错误：
[尝试使用产品所需的字段定义类或接口（imageurl等），将其导入到您的组件中，然后将产品变量创建为新类型，例如产品：产品；而不是产品：{};
例如
export class Product
{
imageUrl: string;
title: string;
...
}
您已将product定义为没有属性的类型：product: {};这是错误的意思-您没有说过product具有title，price等。如果添加然后应该可以使用的属性。
product: {
title: string;
price: number;
//etc.
};