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

If you need something quick and dirty, not so much for production as just grabbing some data for a non-technical user, you could paste this in console:

require 'csv'
class ActiveRecord::Relation
  def to_csv
    ::CSV.generate do |csv|
      csv << self.model.attribute_names
      self.each do |record|
        csv << record.attributes.values
      end
    end
  end
end

Then do: User.select(:id,:name).all.to_csv

If you were going to production, I'd probably turn this into a decorator around ActiveRecord::Relation and more precisely ensuring that the order of your fields/attributes.