按钮图标添加

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1.安装font-awesome-rails

Gemfile
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gem "font-awesome-rails"

bundle install

app/assets/stylesheets/application.scss
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@import "font-awesome";

重开server

2.将需要换上按钮的地方。写上查找到的图标代码
eg：将helper中的render_job_status(job)

app/helpers/jobs_helper.rb
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def render_job_status(job)
  if job.is_hidden
    content_tag(:span, "", :class => "fa fa-lock")
  else
    content_tag(:span, "", :class => "fa fa-globe")
  end
end