Chartkick Problem in a Rails Application

Question

I’m trying to implement the Gem Chartkick in a Rails application, but I’m having a small problem.

My application has a relationship between two models:

class Animal < ActiveRecord::Base
  belongs_to :race
end

In my view, I’m trying to present the Percentage of Animals by Breed.

<%= pie_chart  @animals.group(:race).count %>

The Charts are being presented as follows:

How do I present the names of the Races and not Race:0x007f6d48812970?

Answer 1

In the model add the to_s method

    def to_s
      "#{self.name}"
    end

Answer 2

You need to join before invoking Chartkick:

<%= pie_chart  @animals.joins(:race).group('races.name').count %>

Note: I did not test the code above.

Source: https://github.com/ankane/chartkick/issues/34