Squid · A Ruby library to plot charts in PDF files
Either type gem install squid or add gem 'squid', '~> 1.2' to your Gemfile. Note that Ruby >= 2.1 is required. And Rails >= 4.0, if used with Rails. The project is open source (MIT license) and the code available on GitHub. Squid adds a single method chart(data = {}, settings = {}) to the Prawn::Document class. If you have never used Prawn to generate PDF files, you should first read its manual. G
Chartkick - Create beautiful JavaScript charts with one line of Ruby
<%= line_chart @goals.map { |goal| {name: goal.name, data: goal.feats.group_by_week(:created_at).count} } %> or <%= line_chart Feat.group(:goal_id).group_by_week(:created_at).count %> Say Goodbye To Timeouts Make your pages load super fast and stop worrying about timeouts. Give each chart its own endpoint. <%= line_chart completed_tasks_charts_path %> And in your controller, pass the data as JSON.
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