[英]Property 'id' does not exist on type 'void'
我试图为我的角度应用程序的所有操作实施审核跟踪,例如“删除”,“ addUser”,“更新”等。我能够通过“ posts-dashboard”中的“ post blog”功能成功实现此目的。 component.ts”,现在我尝试使用“ student-user.component.ts”中的“ delete user”功能执行相同操作,但编译器返回错误“ void”类型上不存在“ Property'id” '”
我尝试将id定义为“ id:any;” 和'id ='''但我不认为这是解决方案。 错误不会消失。 审计跟踪功能应该在控制台中打印输出(审计跟踪),并将审计跟踪日志存储在审计跟踪模型下的数据库中
这是我的student-user.component.ts。 寻找deleteStudent(value)函数...这就是我实现它的地方
import { Component, OnInit } from '@angular/core';
import { map, catchError} from 'rxjs/operators';
import {FirebaseService} from '../services/firebase.service';
import {Router} from '@angular/router';
import { AngularFirestore} from "angularfire2/firestore";
import { Observable } from 'rxjs';
import { AuditTrailService } from 'src/app/services/audit-trail/audit-trail.service';
import { AngularFireStorage } from '@angular/fire/storage';
@Component({
selector: 'app-student-user',
templateUrl: './student-user.component.html',
styleUrls: ['./student-user.component.scss']
})
export class StudentUserComponent implements OnInit{
students: any;
students_data :any;
public searchString: string;
response: any;
is_loading: any;
ideas; any;
term = '';
//id: any[];
constructor(
public firebaseService: FirebaseService,
private router: Router,
public db: AngularFirestore,
private storage: AngularFireStorage,
public _auditTrailService:AuditTrailService
) { }
ngOnInit() {
this.getStudents()
this.searchStudents(event)
}
getStudents() {
this.students_data = this.db.collection('User', ref => ref.where('role', '==', 'student')).snapshotChanges().pipe(map(changes => {
return changes.map(a => {
const data: any = a.payload.doc.data();
data.id = a.payload.doc.id;
return data;
});
})
);
this.students_data.subscribe(
res => {
console.log(res);
this.students = res;
//this.blogs_snapshot = res;
});
}
searchStudents(event){
if (event.key === "Enter"){
console.log(this.term)
this.db.collection('User', ref => ref.where('full_name', '==', this.term)).valueChanges().subscribe(
res => {
this.response = res;
console.log(this.response);
this.ideas = res;
this.is_loading = false;
}
);
}
}
deleteStudent(value){
this.db.collection('User').doc(value).delete().then(
res =>{
console.log(res)
this.students = res;
const _audit_trail = {
'action' : ' has deleted a student ',
'object': res.id,
'created_at': new Date(),
'user':{
'id': '4545454545454545454',
'email':'daanyu@gmail.com' }
}
console.log(_audit_trail)
this._auditTrailService.createAuditTrailLog(_audit_trail)
},
err=>{
console.log(err)
}
)
}
}
这是我的错误...
ERROR in src/app/student-user/student-user.component.ts(87,23): error TS2339: Property 'id' does not exist on type 'void'.
我使用Firebase作为数据库,这是我期望在audit-trail模型下的数据库中返回的内容:
操作“已删除学生”在UTC + 3用户于2019年7月22日下午5:49:33创建:电子邮件“ daanyu@gmail.com” id“ 4545454545454545454”
我以前没有使用过Firebase,但是您的错误使我相信Firestore中的delete()
方法不会返回成功响应,因为它暗示res
的类型为void
。 您可以根据用例使用来自this.students
或this.response
的ID。
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