撤销操作： https://railstutorial-china.org/book/chapter3.html#aside-undoing-things
HTTP 超文本传输协议 https://railstutorial-china.org/book/chapter3.html#aside-get-etc
测试 https://railstutorial-china.org/book/chapter3.html#aside-when-to-test
视图中使用 ruby
# 嵌入式 Ruby 代码# 设置参数<% PRovide(:title, "The Title") %># 调用参数<%= yield(:title) %>定义辅助方法 app/helpers/application_helper.rb
module ApplicationHelper # 根据所在的页面返回完整的标题 def full_title(page_title = '') base_title = "Ruby on Rails Tutorial Sample App" if page_title.empty? base_title else page_title + " | " + base_title end endend新闻热点
疑难解答
