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@@ -488,21 +488,26 @@ module Squirrel
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         op, arg_format, values = operator, "?", [operand]
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         op, arg_format, values = case operator
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-        when :<=>       then    [ "BETWEEN", "? AND ?",   [ operand.first, operand.last ] ]
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-        when :=~        then
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+        when :<=>        then    [ "BETWEEN", "? AND ?",   [ operand.first, operand.last ] ]
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+        when :=~         then
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           case operand
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-          when String   then    [ "LIKE",    arg_format,  values ]
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-          when Regexp   then    [ "REGEXP",  arg_format,  values.map(&:source) ]
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+          when String    then    [ "LIKE",    arg_format,  values ]
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+          when Regexp    then    [ "REGEXP",  arg_format,  values.map(&:source) ]
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           end
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-        when :==, :===  then
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+        when :==, :===   then
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           case operand
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-          when Array    then    [ "IN",      "(?)",       values ]
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-          when Range    then    [ "IN",      "(?)",       values ]
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-          when nil      then    [ "IS",      "NULL",      [] ]
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-          else                  [ "=",       arg_format,  values ]
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+          when Array     then    [ "IN",      "(?)",             values ]
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+          when Range     then    [ "IN",      "(?)",             values ]
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+          when Condition then    [ "=",       operand.full_name, [] ] 
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+          when nil       then    [ "IS",      "NULL",            [] ]
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+          else                   [ "=",       arg_format,        values ]
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+          end
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+        when :contains   then    [ "LIKE",    arg_format,        values.map{|v| "%#{v}%" } ]
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+        else
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+          case operand
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+          when Condition then    [ op,        oprand.full_name,  [] ] 
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+          else                   [ op,        arg_format,        values ]
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           end
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-        when :contains  then    [ "LIKE",    arg_format,  values.map{|v| "%#{v}%" } ]
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-        else                    [ op,        arg_format,  values ]
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         end    
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         sql = "#{full_name} #{op} #{arg_format}"
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         sql = "NOT (#{sql})" if @negative

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@@ -282,4 +282,9 @@ class SquirrelTest < Test::Unit::TestCase
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     assert_equal(User.find(1),
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                  User.scoped{ name =~ "Jon%" }.scoped{ id < 3 }.first)
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   end
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+
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+  def test_conditions_can_be_rvalues
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+    query = User.find(:query){ posts.body == posts.tags.name }
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+    assert_equal ["((posts.body = tags.name))"], query.to_find_conditions
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+  end
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 end