Now that Rails 4.0 support is dropped we can replace prepend by include

Author: n-rodriguez

lib/ajax-datatables-rails/datatable/column.rb

@@ -18,7 +18,7 @@ class Column
 
       include Search
       include Order
-      prepend DateFilter
+      include DateFilter
 
 
       def initialize(datatable, index, options)

lib/ajax-datatables-rails/datatable/column/date_filter.rb

@@ -47,14 +47,6 @@ def date_range_search
 
         private
 
-        def non_regex_search
-          if cond == :date_range
-            date_range_search
-          else
-            super
-          end
-        end
-
         def range_start_casted
           range_start.blank? ? parse_date('01/01/1970') : parse_date(range_start)
         end

lib/ajax-datatables-rails/datatable/column/search.rb

@@ -68,6 +68,8 @@ def non_regex_search
             casted_column.matches("%#{formatted_value}%")
           when :string_eq
             raw_search(:eq)
+          when :date_range
+            date_range_search
           end
         end