Chartkick

Create beautiful Javascript charts with one line of Ruby. No more fighting with charting libraries!

Works with Rails, Sinatra and most browsers (including IE 6)

:two_hearts: A perfect companion to groupdate

Usage

Line chart

<%= line_chart User.group_by_day(:created_at).count %>

Pie chart

<%= pie_chart Goal.group("name").count %>

Column chart

<%= column_chart Task.group_by_hour_of_day(:created_at).count %>

Multiple series (except pie chart)

<%= line_chart @goals.map{|goal|
    {:name => goal.name, :data => goal.feats.group_by_week(:created_at).count }
} %>

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.

class ChartsController < ApplicationController
  def completed_tasks
    render :json => Task.group_by_day(:completed_at).count
  end
end

Note: This feature requires jQuery at the moment.

Id and height

<%= line_chart User.group_by_day(:created_at).count, :id => "users-chart", :height => "500px" %>

Min and max values (except pie chart)

<%= line_chart User.group_by_day(:created_at).count, :min => 1000, :max => 5000 %>

You can pass options directly to the charting library with:

<%= line_chart User.group_by_day(:created_at).count, :library => {:backgroundColor => "#eee"} %>

Pass data as a Hash or Array

<%= pie_chart({"Football" => 10, "Basketball" => 5}) %>
<%= pie_chart [["Football", 10], ["Basketball", 5]] %>

For multiple series, use the format

<%= line_chart [
  {:name => "Series A", :data => series_a},
  {:name => "Series B", :data => series_b}
] %>

Times can be a time, a timestamp, or a string (strings are parsed)

<%= line_chart({20.day.ago => 5, 1368174456 => 4, "2013-05-07 00:00:00 UTC" => 7}) %>

Add this line to your application's Gemfile:

gem "chartkick"

And add the javascript files to your views. These files must be included before the helper methods.

For Google Charts, use:

<%= javascript_include_tag "//www.google.com/jsapi", "chartkick" %>

If you prefer Highcharts, use:

<%= javascript_include_tag "path/to/highcharts.js", "chartkick" %>

chartkick.js runs as a Rails engine - no need to install it.

You must include chartkick.js manually. Download it here

You must include chartkick.js manually. Download it here

<script src="//www.google.com/jsapi"></script>
<script src="chartkick.js"></script>

You must include chartkick.js manually. Download it here

In addition, you must specify http or https if you use Google Charts, since Padrino tries to append .js to protocol relative urls.

<%= javascript_include_tag "https://www.google.com/jsapi", "chartkick" %>

Chartkick uses iso8601.js to parse dates and times.