module RenderCsv::CsvRenderable
Public Instance Methods
to_csv(options = {})
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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
# 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