Contents

module RenderAsCSV
  def self.included(base)
    base.alias_method_chain :render, :csv
  end

  def render_with_csv(options = nil, extra_options = {}, &block)
    return render_without_csv(options, extra_options, &block) unless options.is_a?(Hash) and options[:csv].present?

    content  = options.delete(:csv)
    style    = options.delete(:style) || :default
    filename = options.delete(:filename)

    headers.merge!(
      'Content-Transfer-Encoding' => 'binary',
      'Content-Type'              => 'text/csv; charset=utf-8'
    )
    filename_header_value = "attachment"
    filename_header_value += "; filename=\"#{filename}\"" if filename.present?
    headers.merge!('Content-Disposition' => filename_header_value)

    @performed_render = false

    render_stream :status => 200,
                  :content => Array(content),
                  :style => style
  end

  protected

  def render_stream(options)
    status  = options[:status]
    content = options[:content]
    style   = options[:style]

    if defined? Rails and (Rails.version.split('.').map(&:to_i) <=> [2,3,14]) <= 0
      render :status => status, :text => Proc.new { |response, output|
        output.write CSV_HANDLER.generate_line(content.first.to_comma_headers(style))
        content.each { |line| output.write CSV_HANDLER.generate_line(line.to_comma(style)) }
      }
    else
      self.status = status
      self.response_body = proc { |response, output|
        output.write CSV_HANDLER.generate_line(content.first.to_comma_headers(style))
        content.each { |line| output.write CSV_HANDLER.generate_line(line.to_comma(style)) }
      }
    end
  end
end
#credit : http://ramblingsonrails.com/download-a-large-amount-of-data-in-csv-from-rails

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
comma-2.1.1	lib/comma/render_as_csv.rb
comma-2.1	lib/comma/render_as_csv.rb