Chartkick

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

See it in action

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

💕 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 }
} %>

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.

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.

Options

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"} %>

You can also pass a content_for option, this will put the initializing javascripts in the content_block you specify:

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

Then, in your layout:

<%= content_for :js_initialization %>

Data

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}) %>

Installation

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, unless using the content_for option to the helper.

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" %>

For Rails 3.1+

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

For Rails 2.3 and 3.0

You must include chartkick.js manually. Download it here

For Sinatra

You must include chartkick.js manually. Download it here

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

For Padrino

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" %>

No Ruby? No Problem

Check out chartkick.js

Credits

Chartkick uses iso8601.js to parse dates and times.

History

View the changelog

Chartkick follows Semantic Versioning

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request