从 Google Drive 快速下载 Sqlite 文件

Question

我将一个 sqlite 数据库上传到谷歌驱动器。现在我想下载它。所以我尝试将它从 Google Drive 下载到我的 Swift 项目，但它是以 GTLRDataObject 数据格式下载的。如何将文件转换为 sqlite 数据库格式？ sqlite 文件来自 Google 驱动器的数据格式。我使用以下内容从谷歌驱动器下载了我的 sqlite 数据库文件。

Global.googleDriveService.executeQuery(GTLRDriveQuery_FilesGet.queryForMedia(withFileId: "\((result as? GTLRDrive_File)?.identifier ?? "")"))
{ (ticket, file, error) in
    guard let data = (file as? GTLRDataObject)?.data else {
        return
    }
    print("Download data: - \(data)")
}

Answer 1

如果您这样做是为了备份数据库和恢复数据库文件，那么您需要执行以下操作

  func getAndSaveFileromGoogle() {
    let query = GTLRDriveQuery_FilesList.query()
    query.spaces = "drive"
    self.googleDriveService.executeQuery(query) { (ticket, files, error) in
        if error == nil {
            if let files = files as? GTLRDrive_FileList {
                if let driveFiles = files.files /*?? [GTLRDrive_File]()*/ {
                    if driveFiles.count > 0 {
                        for file in driveFiles {
                            if file.name == "your_filename.sqlite" {
                                print(file.name)
                                print(file.identifier)
                                let downloadQuery = GTLRDriveQuery_FilesGet.queryForMedia(withFileId: file.identifier!)
                                self.googleDriveService.executeQuery(downloadQuery, completionHandler: { (ticket, downloadedFile, error) in
                                    if error == nil {
                                        if let downlaodfile = downloadedFile as? GTLRDataObject {
                                            do {
                                                try downlaodfile.data.write(to: Model.shared.coreDataStoreURL!, options: .atomic)
                                            }
                                            catch {
                                                print(error.localizedDescription)
                                            }
                                        }
                                    }
                                    else {
                                        print("Somethig went wrong")
                                    }
                                })
                            }
                        }
                    }
                    else {
                        
                        print("No back up file found")
                    }
                }
                else {
                    
                    print("No back up file found")
                }
            }
            else {
                
                print("Something went wrong")
            }
        }
        else {
            print("Something went wrong")
        }
    }
}

只需将您的数据库文件替换为新下载的文件。