lib/lamep/Expressions/unary_minus.rb in lamep-0.1 vs lib/lamep/Expressions/unary_minus.rb in lamep-0.2

@@ -5,6 +5,10 @@
     operand = @operand.to_sql
     fail(ArgumentError, ("#{operand} is not a number")) if operand !~ /^\d+$/
     -operand.to_i
   end
 
+  def evaluate(attributes={})
+    [e-mail](attributes).to_i
+  end
+
 end