Whats the best way to convert array of hashes data to specific graph format data

Question

I have an Array of Hashes returned from the below map function. I'm trying to populate data for a graph(I'm using AM charts), which takes data in a specific format mentioned below-

Sample Structure of a Company Record

1.9.3p327 :073 > Company
 => Company(id: integer, name: string, contact_no: integer, email_id: string, website: string, fax_no: integer, created_at: datetime, updated_at: datetime, divisions_count: integer) 

@all_companies = Company.all

Map Function:

@all_companies = @all_companies.map {|each_company| { Country: each_company.name, Visits: each_company.divisions_count} }

Output Format of above query

[{:country=>"Samsung", :visits=>8}, {:country=>"Natraj", :visits=>2}, {:country=>"Tupperware", :visits=>5}, {:country=>"Transcen", :visits=>0}, {:country=>"camlin", :visits=>0}]

Graph Data Input Format:

  var chartData = [{
      country: "USA",
      visits: 4025
  }, {
      country: "China",
      visits: 1882
  }, {
      country: "Japan",
      visits: 1809
  }, {
      country: "Germany",
      visits: 1322
  }]

I'm using Ruby 1.9.3-p327. I need to convert my output array to the specific graph format. . I try going about the same through the following steps:-

  1.9.3p327 :070 >     @all_companies = @all_companies.to_s.gsub(":","")
 => "[{country=>\"Samsung\", visits=>8}, {country=>\"Natraj\", visits=>2}, {country=>\"Tupperware\", visits=>5}, {country=>\"Transcen\", visits=>0}, {country=>\"camlin\", visits=>0}]" 
1.9.3p327 :071 >     @all_companies = @all_companies.gsub("=>",": ")
 => "[{country: \"Samsung\", visits: 8}, {country: \"Natraj\", visits: 2}, {country: \"Tupperware\", visits: 5}, {country: \"Transcen\", visits: 0}, {country: \"camlin\", visits: 0}]" 
1.9.3p327 :072 > puts @all_companies
[{country: "Samsung", visits: 8}, {country: "Natraj", visits: 2}, {country: "Tupperware", visits: 5}, {country: "Transcen", visits: 0}, {country: "camlin", visits: 0}]
 => nil 
1.9.3p327 :073 > 

Now when I'm trying to display the data in my graph, I'm getting the below Syntax error:-

var chartData = [{country: "Samsung", visits: 8}, {country: "Natraj", visits: 2}, {country: "Tupperware", visits: 5}, {country: "Transcen", visits: 0}, {country: "camlin", visits: 0}]

The syntax error from the firebug console now points to &quot in the above data.

Any work arounds that could help me get through the last step so that I can get the desired graph format?

Question Updated

I need the Data in following format :-

  var chartData = [

      {
          country: "Samsung",
          visits: 8
      },
      {
          country: "Natraj",
          visits: 2
      },
      {
          country: "Tupperware",
          visits: 5
      },
      {
          country: "Transcen",
          visits: 0
      },
      {
          country: "camlin",
          visits: 0
      }

      ]

Thank you.

Answer 1

I figured it out thanks to this question.

This is what I do to overcome the &quot syntax error.

In the controller:-

def company_division_stats
    @all_companies = @companies_data = Company.all 

    @specific_details = @all_companies = @all_companies.map {|each_company| { country: each_company.name, visits: each_company.divisions_count} } 
    #@all_companies = @all_companies.to_s.gsub(":","")
    #@all_companies = @all_companies.gsub("=>",": ")

    respond_to do |format|
      unless @all_companies.nil?
        format.html
        format.json { render json: @specific_details, status: :created } #in the browser url would be:- localhost:3000/company_division_stats.json
      end
    end

In the view:-

var chartData = <%= @all_companies.to_json.html_safe %>

Answer 2

Because you are not printing your value. The console is only displaying it, double quotes are escaped.
Otherwise how would you know where my string: "my "string" what" ends?

If you just do

puts @specific_details.to_s

you will not see those double quotes escaped.

Answer 3

I need to convert my output array to the specific graph format.

Do this using Awesome Print Rubygem -

require "awesome_print"

hsh = [{:Country=>"Samsung", :Visits=>8}, {:Country=>"Natraj", :Visits=>2}, 
       {:Country=>"Tupperware", :Visits=>5}, {:Country=>"Transcen", :Visits=>0}, 
      {:Country=>"camlin", :Visits=>0}]

ap hsh,{:index => false}

output

[
    {
        :Country => "Samsung",
         :Visits => 8
    },
    {
        :Country => "Natraj",
         :Visits => 2
    },
    {
        :Country => "Tupperware",
         :Visits => 5
    },
    {
        :Country => "Transcen",
         :Visits => 0
    },
    {
        :Country => "camlin",
         :Visits => 0
    }
]