Module: RenderCsv::CsvRenderable

Defined in:
lib/render_csv/csv_renderable.rb

Instance Method Summary collapse

Instance Method Details

#to_csv(options = {}) ⇒ Object

Converts an array to CSV formatted string Options include: :only => [:col1, :col2] # Specify which columns to include :except => [:col1, :col2] # Specify which columns to exclude :add_methods => [:method1, :method2] # Include addtional methods that aren’t columns



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# File 'lib/render_csv/csv_renderable.rb', line 10

def to_csv(options = {})
  return '' if empty?
  return join(',') unless first.class.respond_to? :column_names

  columns = first.class.column_names
  columns &= options[:only].map(&:to_s) if options[:only]
  columns -= options[:except].map(&:to_s) if options[:except]
  columns += options[:add_methods].map(&:to_s) if options[:add_methods]

  CSV.generate(encoding: 'utf-8') do |row|
    row << columns
    self.each do |obj|
      row << columns.map { |c| obj.send(c) }
    end
  end
end