Question

如何使用Laravel从postgres bytea字段存储和获取数据？我想更新二进制数据并下载它们。文件类型是jpg，excel，txt等。我可以吗？

目前我的代码存储。

    public function store_db( $file, $file_name, $user_id ) {

    $file_path = $file->getRealPath();

    $new_attachment = Attachment::create([
        'name' => $file_name,
        'mime' => $file->getClientMimeType(),
        'size' => $file->getClientSize(),
        'uploaded_data' => pg_escape_bytea(file_get_contents($file_path)),
        'created_by' => $user_id,
        'updated_by'=> $user_id,
        'created_at' => Carbon::now(),
        'updated_at' => Carbon::now()
    ]);

    return $new_attachment->id;

接下来获取和下载数据（jpg，excel等）

    public function get_attachment( $id ) {
    $file = $this->attachmentRepository->findWithoutFail($id);

    $dbh = DB::connection()->getPdo();

    $stmt = $dbh->prepare("SELECT name, mime, trim(trailing from encode(uploaded_data,'escape')) AS encode_data FROM attachments WHERE attachments.id = :atid");
    $stmt->bindParam(':atid', $id);
    $stmt->execute();
    $result = $stmt->fetch($dbh::FETCH_ASSOC);

    $name = $result['name'];
    $mime = $result['mime'];
    $headers = array(
        "Content-Type: {$mime}",
    );
    $fileData = $result['encode_data'];

    $ext = substr($name, strrpos($name, '.') + 1);
    file_put_contents($ext , pg_unescape_bytea($fileData));


    return response()->download($ext, $name, $headers);

Answer 1

您的代码的一部分对Laravel 7来说对我自己很有用。在这里，我的解决方案对我而言100％可用。我仍在等待，它将为您提供帮助。对不起，我的英语不是我的母语。

    <!DOCTYPE html>
    <html>
    <head>
    <script src="https://pyodide-cdn2.iodide.io/v0.15.0/full/pyodide.js"></script>
    </head>
    <body>
    </body>
    </html>

最诚挚的问候，米格

Laravel使用postgresql，存储并获取二进制数据

1 个答案: