Question

我似乎遇到了问题。当管理员用户点击按钮时，我想编写一些可以转储mysql数据库的代码。我尝试在下面的views.py中编写一些代码。

Views.py

    @login_required
    def dbbackup(request):
        if not (request.user.is_authenticated() and request.user.is_staff):
            raise http.Http404
        os.chdir('/usr/local/src/djcode/c2duo_mms')  # This is important as apache by default goes to the user's home directory.
        os.popen3("mysqldump --add-drop-table -u " + settings.DATABASE_USER + " -p" + settings.DATABASE_PASSWORD + " " + settings.DATABASE_NAME + " >  backup.sql")
        os.popen3("gzip -c backup.sql > backup.gz")

现在给我一个错误The view c2duo_mms.mmc.views.dbbackup didn't return an HttpResponse object.如果我在最后添加返回HttpResponse。它会说unbound method has_header() must be called with HttpResponse instance as first argument (got str instance instead)。

我不太确定问题是什么。但我无法解决问题。我现在有点困惑。

Answer 1

您需要从方法的末尾返回有效的HttpResponse对象。例如，如果要返回gzip文件：

@login_required
def dbbackup(request):
    if not (request.user.is_authenticated() and request.user.is_staff):
        raise http.Http404
    os.chdir('/usr/local/src/djcode/c2duo_mms')  # This is important as apache by default goes to the user's home directory.
    os.popen3("mysqldump --add-drop-table -u " + settings.DATABASE_USER + " -p" + settings.DATABASE_PASSWORD + " " + settings.DATABASE_NAME + " >  backup.sql")
    os.popen3("gzip -c backup.sql > backup.gz")
    dataf = open('/usr/local/src/djcode/c2duo_mms/backup.gz', 'r')
    return HttpResponse(dataf.read(), mimetype='application/x-gzip')

这应该开始下载gzip文件。

想要创建一个可以将mysql数据库转储为sql文件的视图

1 个答案: