Tell if a condition is negative

lib/ransack/nodes/condition.rb

@@ -247,6 +247,10 @@ module Ransack
         "Condition <#{data}>"
       end
 
+      def negative?
+        predicate.negative?
+      end
+
       private
 
       def valid_combinator?

lib/ransack/predicate.rb

@@ -74,5 +74,9 @@ module Ransack
       vals.any? { |v| validator.call(type ? v.cast(type) : v.value) }
     end
 
+    def negative?
+      @name.include?("not_".freeze)
+    end
+
   end
 end

spec/ransack/nodes/condition_spec.rb

@@ -29,6 +29,15 @@ module Ransack
         specify { expect(subject.values.size).to eq(2) }
       end
 
+      describe '#negative?' do
+        let(:context) { Context.for(Person) }
+        let(:eq)      { Condition.extract(context, 'name_eq', 'A') }
+        let(:not_eq)  { Condition.extract(context, 'name_not_eq', 'A') }
+
+        specify { expect(not_eq.negative?).to be true }
+        specify { expect(eq.negative?).to be false }
+      end
+
       context 'with an invalid predicate' do
         subject {
           Condition.extract(