来自putString()的UploadTask问题

时间:2018-12-04 11:12:04

标签: typescript firebase ionic-framework google-cloud-firestore firebase-storage

我从Firebase Storage的UploadTask遇到问题。 我正在尝试上传图像,然后将图像URL保存在Firestore Cloud中。为此,我有以下代码:

newuploadImage() {
    this.image = 'movie-' + new Date().getTime() + '.jpg';
    let storageRef: any,
    parseUpload: any;
    storageRef = firebase.storage().ref('imgs/' + this.image);
    parseUpload = storageRef.putString(this.cameraImage, 'data_url')
    parseUpload.on('state_changed',
    function (snapshot) {
    }, function (error) {
    }, function () {
        // Upload completed successfully, now we can get the download URL
        parseUpload.snapshot.ref.getDownloadURL().then(function (downloadURL) {
            const idPubli = this.firestore.createId();
            const idReto = this.firestore.createId();
            let IDUser = firebase.auth().currentUser.uid;
            let img = downloadURL
            const idPuntPubli = this.firestore.createId();
            let participacionCreadora = true;
            let punt = 0;
            this.firestore.doc(`public/${idPubli}`).set({
                idPubli,
                idReto,
                IDUser,
                img,
                idPuntPubli,
                participacionCreadora,
                punt,
            })
        });
    })
}

该图像可以很好地上传,但是当它尝试执行 this.firestore 时,控制台日志显示了以下错误:

  

错误TypeError:无法读取未定义的属性“ firestore”

我不知道如何克服这个错误。

编辑

这是导入和构造函数,以防出现问题。

import {  AngularFirestore} from 'angularfire2/firestore';

constructor(public camera: Camera, public firestore: AngularFirestore) {
  }

2 个答案:

答案 0 :(得分:1)

您很可能遇到了示波器问题,可以通过替换此功能来解决该问题:

.then(function (downloadURL)

具有箭头功能(保留了词法范围)。

.then((downloadURL) =>

答案 1 :(得分:0)

共享我的代码,也许会对您有所帮助。

  this.imageFile.name.substr(this.imageFile.name.lastIndexOf('.'));
  const fileRef = this.storage.ref(this.filePath);
  this.task = this.storage.upload(this.filePath, this.imageFile);
  this.uploadPercent = this.task.percentageChanges();
  this.task
    .snapshotChanges()
    .pipe(
      finalize(() => {
        this.downloadURL = fileRef.getDownloadURL();
        this.downloadURL.subscribe(url => {
          this.imageUrl = url;
        });
      })
    )
    .subscribe();
  return this.uploadPercent;
}