When I use my custom pipe in template, it is like this. And it works well.
当我在模板中使用自定义管道时,就像这样。它运作良好。
{{user|userName}}
Is it possible to use pipe in the code? I try to use like this,
是否可以在代码中使用管道?我尝试这样使用,
let name = `${user|userName}`;
But it shows
但它表明
userName is not defined
userName未定义
My alternative way is using db.collection.findOne() manually in the code. But is there any smart way?
我的另一种方法是在代码中手动使用db.collection.findOne()。但有什么聪明的方法吗?
2 个解决方案
#1
65
@Siva is correct. And thanks!
@Siva是对的。谢谢!
So the way to use the pipe in the component is like this:
因此在组件中使用管道的方式如下:
let name = new UserNamePipe().transform(user);
Link to another similar question.
链接到另一个类似的问题。
#2
41
this is the way you can use Pipe in component:
这是在组件中使用Pipe的方法:
import { YourPipeComponentName } from '@angular/common';
class YourService {
constructor(private pipe: YourPipeComponentName) {}
YourFunction(value) {
this.pipe.transform(value, 'pipeFilter');
}
}
#1
65
@Siva is correct. And thanks!
@Siva是对的。谢谢!
So the way to use the pipe in the component is like this:
因此在组件中使用管道的方式如下:
let name = new UserNamePipe().transform(user);
Link to another similar question.
链接到另一个类似的问题。
#2
41
this is the way you can use Pipe in component:
这是在组件中使用Pipe的方法:
import { YourPipeComponentName } from '@angular/common';
class YourService {
constructor(private pipe: YourPipeComponentName) {}
YourFunction(value) {
this.pipe.transform(value, 'pipeFilter');
}
}