问题[ruby-on-rails](ubuntu)

我正在尝试为我的旧 Rails 项目运行 rake db:setup，它会引发以下错误。

`rake aborted!
Gem::LoadError: Specified 'mysql' for database adapter, but the gem is not loaded. Add `gem 'mysql'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).


Caused by:
Gem::LoadError: mysql is not part of the bundle. Add it to your Gemfile.

Tasks: TOP => db:setup => db:schema:load_if_ruby => db:create
(See full trace by running task with --trace)`

这是我的红宝石版本ruby 2.3.8p459 (2018-10-18 revision 65136) [x86_64-linux]

我的导轨版本Rails 4.2.7.1

和mysql版本mysql Ver 14.14 Distrib 5.5.56, for linux-glibc2.5 (x86_64) using readline 5.1

谢谢

我已经下载了 RubyMine 存档并将其解压缩到我的主目录中。当我执行./RubyMine/bin/rubymine.sh时，IDE 启动，在 Ubuntu 面板中，我可以看到 RubyMine 图标。当我右键单击它时，没有“添加到收藏夹”之类的选项。有没有办法将 RubyMine 图标添加到面板中？提前致谢。