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@@ -1,5 +1,7 @@
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 *1.14.1* (April 6th, 2005)
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+* Enable Limit/Offset in Calculations (closes #4558) [lmarlow@yahoo.com]
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+
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 * Fixed that loading including associations returns all results if Load IDs For Limited Eager Loading returns none (closes #4528) [Rick]
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 * Fixed HasManyAssociation#find bugs when :finder_sql is set #4600 [lagroue@free.fr]

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@@ -1,6 +1,6 @@
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 module ActiveRecord
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   module Calculations #:nodoc:
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-    CALCULATIONS_OPTIONS = [:conditions, :joins, :order, :select, :group, :having, :distinct]
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+    CALCULATIONS_OPTIONS = [:conditions, :joins, :order, :select, :group, :having, :distinct, :limit, :offset]
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     def self.included(base)
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       base.extend(ClassMethods)
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     end
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@@ -153,6 +153,7 @@ module ActiveRecord
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           sql << " GROUP BY #{options[:group_field]}" if options[:group]
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           sql << " HAVING #{options[:having]}" if options[:group] && options[:having]
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           sql << " ORDER BY #{options[:order]}" if options[:order]
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+          add_limit!(sql, options)
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           sql.join
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         end
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@@ -48,6 +48,18 @@ class CalculationsTest < Test::Unit::TestCase
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     assert_equal [6, 2, 1], c.keys.compact
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   end
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+  def test_should_limit_calculation
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+    c = Account.sum(:credit_limit, :conditions => "firm_id IS NOT NULL",
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+                    :group => :firm_id, :order => "firm_id", :limit => 2)
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+    assert_equal [1, 2], c.keys.compact
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+  end
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+
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+  def test_should_limit_calculation_with_offset
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+    c = Account.sum(:credit_limit, :conditions => "firm_id IS NOT NULL",
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+                    :group => :firm_id, :order => "firm_id", :limit => 2, :offset => 1)
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+    assert_equal [2, 6], c.keys.compact
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+  end
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+
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   def test_should_group_by_summed_field_having_condition
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     c = Account.sum(:credit_limit, :group => :firm_id, 
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                                    :having => 'sum(credit_limit) > 50')