javascript - 尝试更新和删除多个位置时未调用/触发返回的 Pomises Angular Firebase Web api

Question

删除帖子时尝试设置多个定位删除。

但是问题该方法不会继续执行以下代码行:const deleteFromDatabase = this.db.ref().update(updateObject);

对如何实现这个逻辑画一个空白。尽管超出了那行代码，我怎样才能让它遵循呢？例如，当有 storageUri(图片和拇指)时，它似乎没有达到返回 Promise.all 的 if 条件

deletePost(postId, pictureStorageUri, thumbStorageUri): Promise<any> {
        console.log(`Deleting ${postId}`);

        // CONSTRUCT/DEFINE update object for real-time database data deletion
        const updateObject = {};
        updateObject[`/posts/${postId}`] = null;
        updateObject[`/people/${this.currentUser.uid}/posts/${postId}`] = null;
        updateObject[`/feed/${this.currentUser.uid}/${postId}`] = null;
        updateObject[`/comments/${postId}`] = null;
        updateObject[`/likes/${postId}`] = null;

        // DEFINE/CALL deleteFromDatabase promise
        const deleteFromDatabase = this.db.ref().update(updateObject);

        // IF Picture Uris DEFINE/CALL storage delete promises
        if (pictureStorageUri) {
            const deleteFullFromStorage = this.storage.refFromURL(pictureStorageUri).delete();
            const deleteThumbFromStorage = this.storage.refFromURL.delete();
            console.log('promise being called');
            return Promise.all([deleteFromDatabase, deleteFullFromStorage, deleteThumbFromStorage]);
        }

        // RETURNS this promise if no picture uris
        return deleteFromDatabase;
    }

Answer 1

如果您想从 if 语句返回某些内容，您的代码需要如下所示:

deletePost(postId, pictureStorageUri, thumbStorageUri): Promise<any> {
        console.log(`Deleting ${postId}`);

        // CONSTRUCT/DEFINE update object for real-time database data deletion
        const updateObject = {};
        updateObject[`/posts/${postId}`] = null;
        updateObject[`/people/${this.currentUser.uid}/posts/${postId}`] = null;
        updateObject[`/feed/${this.currentUser.uid}/${postId}`] = null;
        updateObject[`/comments/${postId}`] = null;
        updateObject[`/likes/${postId}`] = null;

        // DEFINE/CALL deleteFromDatabase promise
        let promise = this.db.ref().update(updateObject);

        // IF Picture Uris DEFINE/CALL storage delete promises
        if (pictureStorageUri) {
            const deleteFullFromStorage = this.storage.refFromURL(pictureStorageUri).delete();
            const deleteThumbFromStorage = this.storage.refFromURL.delete();
            console.log('promise being called');
            promise = Promise.all([promise, deleteFullFromStorage, deleteThumbFromStorage]);
        }

        // RETURNS this promise if no picture uris
        return promise;
    }

只是为了给您一个想法，也许您可​​以使用另一个辅助变量来使命名更清晰。