How to download CSV file in Ruby on Rails.

*Suppose we want to download all icd_code as a csv_file*

Step-1 Create a download button in given page.

<a href="<%= download_ic_icd_codes_path(current_ic) %>" class="btn btn-success">

<i class="fa fa-download"></i> Download

</a>

step-2

create a action inside icd_code controller to download

def download

send_data(IcdCode.to_csv(IcdCode.id_asc), type: 'text/csv; charset=utf-8; header=present', filename: 'IcdCodes.csv')

end

*to_csv is a method which is defined inside of icd_code model*

step-3

create to_scv method inside icd_code model.

def self.to_csv(icd_codes)

CSV.generate do |csv|

csv << [ "ICD 9 CODE", "ICD 10 CODE", "DESCRIPTION", "OFF WORK", "LIGHT DUTY", "immediate",

"1 week", "2 weeks", "4 weeks", "6 weeks", "8 weeks", "10 weeks", "12 weeks", "16 weeks",

"NOTE", "BODY PART"

]

icd_codes.each do |icd|

csv << [ icd.name, icd.icd10, icd.description, icd.off_work, icd.light_duty, icd.immediate_message,

icd.week_message(1), icd.week_message(2), icd.week_message(4), icd.week_message(6),

icd.week_message(8), icd.week_message(10), icd.week_message(12), icd.week_message(16),

icd.note, icd.get_body_parts

]

end

end

end

step 4

define the route for download action.

resources :icd_codes do

collection do

get :download

end

end

Step-5 Click on dowload buttom.