學習flask web開發遇到的一些問題及解決方案

Q：ExtDeprecationWarning: Importing flask.ext.script is deprecated, use flask_script instead.
.format(x=modname), ExtDeprecationWarning
A：把flask.ext.script中的.ext.換成底線_ Q:UserWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True to suppress this warning.
warnings.warn(‘SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True to suppress this warning.’)
A:在代碼中加一行

 track_modifications = app.config.setdefault('SQLALCHEMY_TRACK_MODIFICATIONS'    , True)

Q：heroku login出現問題 如圖:

A：原因是ruby版本太低，需升級。命令如下：

$ sudo apt-add-repository ppa:brightbox/ruby-ng$ sudo apt-get update$ sudo apt-get install ruby2.2$ ruby2.2 -vruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-linux-gnu]

參考連結：1.http://stackoverflow.com/questions/26595620/how-to-install-ruby-2-1-4-on-ubuntu-14-04
2.http://qiita.com/35_267_/items/29badc389a1df4d56c6f