added :other_than => :!= option to numericality validator

activemodel/lib/active_model/locale/en.yml

@@ -23,5 +23,6 @@ en:
       equal_to: "must be equal to %{count}"
       less_than: "must be less than %{count}"
       less_than_or_equal_to: "must be less than or equal to %{count}"
+      other_than: "must be other than %{count}"
       odd: "must be odd"
       even: "must be even"

activemodel/lib/active_model/validations/numericality.rb

@@ -5,7 +5,7 @@ module ActiveModel
     class NumericalityValidator < EachValidator
       CHECKS = { :greater_than => :>, :greater_than_or_equal_to => :>=,
                  :equal_to => :==, :less_than => :<, :less_than_or_equal_to => :<=,
-                 :odd => :odd?, :even => :even? }.freeze
+                 :odd => :odd?, :even => :even?, :other_than => :!= }.freeze
 
       RESERVED_OPTIONS = CHECKS.keys + [:only_integer]
 
@@ -99,6 +99,7 @@ module ActiveModel
       # * <tt>:equal_to</tt> - Specifies the value must be equal to the supplied value.
       # * <tt>:less_than</tt> - Specifies the value must be less than the supplied value.
       # * <tt>:less_than_or_equal_to</tt> - Specifies the value must be less than or equal the supplied value.
+      # * <tt>:other_than</tt> - Specifies the value must be other than the supplied value.
       # * <tt>:odd</tt> - Specifies the value must be an odd number.
       # * <tt>:even</tt> - Specifies the value must be an even number.
       # * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
@@ -107,7 +108,7 @@ module ActiveModel
       # * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
       #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
-      # * <tt>:strict</tt> - Specifies whether validation should be strict. 
+      # * <tt>:strict</tt> - Specifies whether validation should be strict.
       #   See <tt>ActiveModel::Validation#validates!</tt> for more information
       #
       # The following checks can also be supplied with a proc or a symbol which corresponds to a method:

activemodel/test/cases/validations/numericality_validation_test.rb

@@ -106,6 +106,13 @@ class NumericalityValidationTest < ActiveModel::TestCase
     valid!([2])
   end
 
+  def test_validates_numericality_with_other_than
+    Topic.validates_numericality_of :approved, :other_than => 0
+
+    invalid!([0, 0.0])
+    valid!([-1, 42])
+  end
+
   def test_validates_numericality_with_proc
     Topic.send(:define_method, :min_approved, lambda { 5 })
     Topic.validates_numericality_of :approved, :greater_than_or_equal_to => Proc.new {|topic| topic.min_approved }