68 lines
1.4 KiB
Ruby
68 lines
1.4 KiB
Ruby
module ActiveRecord
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###
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# This class encapsulates a Result returned from calling +exec_query+ on any
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# database connection adapter. For example:
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#
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# x = ActiveRecord::Base.connection.exec_query('SELECT * FROM foo')
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# x # => #<ActiveRecord::Result:0xdeadbeef>
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class Result
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include Enumerable
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attr_reader :columns, :rows, :column_types
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def initialize(columns, rows, column_types = {})
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@columns = columns
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@rows = rows
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@hash_rows = nil
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@column_types = column_types
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end
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def each
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hash_rows.each { |row| yield row }
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end
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def to_hash
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hash_rows
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end
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alias :map! :map
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alias :collect! :map
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# Returns true if there are no records.
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def empty?
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rows.empty?
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end
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def to_ary
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hash_rows
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end
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def [](idx)
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hash_rows[idx]
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end
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def last
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hash_rows.last
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end
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def initialize_copy(other)
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@columns = columns.dup
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@rows = rows.dup
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@hash_rows = nil
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end
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private
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def hash_rows
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@hash_rows ||=
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begin
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# We freeze the strings to prevent them getting duped when
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# used as keys in ActiveRecord::Model's @attributes hash
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columns = @columns.map { |c| c.dup.freeze }
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@rows.map { |row|
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Hash[columns.zip(row)]
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}
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end
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end
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end
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end
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