method

size

v2.1.0 - Show latest stable - Class: ActiveRecord::Associations::AssociationCollection

size()

public

Returns the size of the collection by executing a SELECT COUNT(*) query if the collection hasn’t been loaded and calling collection.size if it has. If it’s more likely than not that the collection does have a size larger than zero and you need to fetch that collection afterwards, it’ll take one less SELECT query if you use length.

# File activerecord/lib/active_record/associations/association_collection.rb, line 186
      def size
        if @owner.new_record? || (loaded? && [email protected][:uniq])
          @target.size
        elsif !loaded? && [email protected][:uniq] && @target.is_a?(Array)
          unsaved_records = Array(@target.detect { |r| r.new_record? })
          unsaved_records.size + count_records
        else
          count_records
        end
      end

size

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