角订阅返回未定义的对象

Question

所以我有一个材料对话框，在这个对话框中我有一个按钮

<button mat-icon-button 
 (click)="getChoosenEmployee(element)">
</button>

元素是Employee类型：

export interface Employee {
    index: number;
    employeeId: string;
    firstName: string;
    lastName: string;
}

当我关闭对话框时，我想将此雇员发送到父组件，这就是我正在做的事情：

  getChoosenEmployee(employee: Employee) {

    this.dialogRef.close(
      employee
    );
  }

我正在通过此功能接收的父组件中

dialogRef.afterClosed().subscribe(result => {
      console.log(this.choosenEmployee);
      this.choosenEmployees.push(this.choosenEmployee);
 });

推动给我一个错误：

core.js:4197 ERROR TypeError: Cannot read property 'push' of undefined
    at SafeSubscriber._next (add-workday-form.component.ts:72)
    at SafeSubscriber.__tryOrUnsub (Subscriber.js:183)
    at SafeSubscriber.next (Subscriber.js:122)
    at Subscriber._next (Subscriber.js:72)
    at Subscriber.next (Subscriber.js:49)
    at Subject.next (Subject.js:39)
    at SafeSubscriber._next (dialog.js:381)
    at SafeSubscriber.__tryOrUnsub (Subscriber.js:183)
    at SafeSubscriber.next (Subscriber.js:122)
    at Subscriber._next (Subscriber.js:72)

Answer 1

您是否初始化了gcloud compute ssh --zone=us-central1-a ${user}@${instance_name_arg} 数组？该错误表明未定义this.choosenEmployees对象，而不是this.choosenEmployees对象。