[英]How to get the key of an element in firebase with AngularFire2?
I am displaying a table of products in my Angular project, it displays just fine but the link which I want in the format /admin/products/key doesnt work.我在我的 Angular 项目中显示产品表,它显示得很好,但我想要的/admin/products/key格式的链接不起作用。 I have come to the conclussion that the
p.$key
isnt showing the key:我得出的结论是
p.$key
没有显示密钥:
<table class="table">
<thead>
<th>Title</th>
<th>Price</th>
<th></th>
</thead>
<tbody>
<tr *ngFor="let p of products$ | async">
<td>{{ p.title }}</td>
<td>{{ p.price }}</td>
<td>
<a [routerLink]="['/admin/products/', p.$key]">Edit</a>
</td>
</tr>
</tbody>
</table>
p.$key value is undefined, does someone knows how to fix it? p.$key值未定义,有人知道如何解决吗?
Ps: If anyone needs to know the value of products$
, it is equal to this.products$ = this.productService.getAll().valueChanges();
ps:如果有人需要知道
products$
的值,等于this.products$ = this.productService.getAll().valueChanges();
Add the idField property inside of valueChanges like this:在 valueChanges 中添加 idField 属性,如下所示:
this.productService.getAll().valueChanges({idField: '$key'});
Then the firebase id will be available within your object like this: p.$key
然后 firebase id 将在您的 object 中可用,如下所示:
p.$key
Also, consider using the json pipe like {{ p | json }}
另外,考虑使用 json pipe 像
{{ p | json }}
{{ p | json }}
for development and you can see all of the values in the object in your browser. {{ p | json }}
用于开发,您可以在浏览器中查看 object 中的所有值。
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