How to convert array of ActiveRecord models to CSV?

Question

I got an array of ActiveRecord models that I wish to convert to a CSV. I tried researching gems like FasterCSV, but they just seem to work with strings and arrays, not Activ

Answer 1

I had this same problem and combined a couple of these answers so I could call to_csv on a model or relation, then input a file name and create a csv file.

class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true

  def self.to_csv
    require 'csv'

    p "What is the name of your file? (don't forget .csv at the end)"

    file_name = gets.chomp

    CSV.open("#{file_name}", "wb") do |csv|
      csv << column_names
      all.find_each do |model|
        csv << model.attributes.values_at(*column_names)
      end
    end
  end
end

Now from console you can call .to_csv on any model or any db query or activerecord relation.