module UsefulRenderers::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 :translate => boolean # Translate headers
# File lib/useful_renderers/csv_renderable.rb, line 12 def to_csv(options = {}) klass = first.class return '' if empty? return join(',') unless klass.respond_to? :column_names columns = options[:only] ? options[:only].map(&:to_s) : klass.column_names columns -= options[:except].map(&:to_s) if options[:except] headers = columns.dup headers.map!{|col| klass.human_attribute_name col } if options[:translate] csv_options = { encoding: 'utf-8', headers: headers, write_headers: true } CSV.generate(csv_options) do |row| self.each do |obj| row << columns.map do |column| column.to_s.split('.').inject(obj) { |o, m| o.try(m) } end end end end