用到的第三方库

gem 'cocoon'
gem 'cache_culture'

设计到的内容

• Nested attributes in Rails and the Cocoon gem
• Many-to-many relationships with an intermediate table
• Authentication via Facebook using an OmniAuth strategy
• Using the jQuery Validate plugin and a dash of AJAX to improve the user’s experience
• Model caching, counter caches (with the cache_culture gem), and eager loading for improved performance
• Visualizing a poll’s statistics with Bootstrap’s progress bars (and a bit of Math)

原文链接

https://www.sitepoint.com/polling-users-rails/