class Array
Public Instance Methods
to_deep_csv(options = {})
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to_csv for Array
<Array>, Array
<Hash>, Array
<ActiveRecord::Base>, ActiveRecord::Relation
etc.
@param [Hash] options CSV options + alpha @option options [Array<Symbol>] column names
@example
[{a: 1, b: 2}].to_deep_csv(headers: true) [[1, 2]].to_deep_csv [[1, 2]].to_deep_csv(headers: true, columns: [:a, :b]) Foo.all.to_deep_csv(headers: true) Foo.all.to_deep_csv(columns: [:id, :name]) Foo.all.select(:id, :name).to_deep_csv {:a => 1}.to_a.to_deep_csv Foo.all.group(:type).count.to_a.to_deep_csv(headers: true, columns: [:type, :count])
# File lib/to_deep_csv/array.rb, line 19 def to_deep_csv(options = {}) # true if Hash like columns_by_first = self.first.try(:attributes).try(:keys) || self.first.try(:keys) columns = options.delete(:columns) || columns_by_first CSV.generate("", options) do |csv| csv << columns if columns && options[:headers] self.each do |record| csv << if columns_by_first # Hash like columns.map do |column| Array(column).reduce(record) {|target, key| target.try(key) || target[key] } end else # Array like record end end end end