Class: Array

Inherits:
Object
  • Object
show all
Defined in:
lib/to_deep_csv/array.rb

Instance Method Summary collapse

Instance Method Details

#to_deep_csv(options = {}) ⇒ Object

to_csv for Array<Array>, Array<Hash>, Array<ActiveRecord::Base>, ActiveRecord::Relation etc.

Examples:

[{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])

Parameters:

  • options (Hash) (defaults to: {}) —

    CSV options + alpha

Options Hash (options):

  • column (Array<Symbol>) —

    names



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# 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