module ActiveRecord ### # This class encapsulates a Result returned from calling +exec_query+ on any # database connection adapter. For example: # # x = ActiveRecord::Base.connection.exec_query('SELECT * FROM foo') # x # => # class Result include Enumerable attr_reader :columns, :rows, :column_types def initialize(columns, rows, column_types = {}) @columns = columns @rows = rows @hash_rows = nil @column_types = column_types end def each hash_rows.each { |row| yield row } end def to_hash hash_rows end alias :map! :map alias :collect! :map # Returns true if there are no records. def empty? rows.empty? end def to_ary hash_rows end def [](idx) hash_rows[idx] end def last hash_rows.last end def initialize_copy(other) @columns = columns.dup @rows = rows.dup @hash_rows = nil end private def hash_rows @hash_rows ||= begin # We freeze the strings to prevent them getting duped when # used as keys in ActiveRecord::Model's @attributes hash columns = @columns.map { |c| c.dup.freeze } @rows.map { |row| Hash[columns.zip(row)] } end end end end