1 files changed, 20 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/type/string.rb b/activerecord/lib/active_record/type/string.rb
index 3b1554bd5a..cf95e25be0 100644
--- a/activerecord/lib/active_record/type/string.rb
+++ b/activerecord/lib/active_record/type/string.rb
@@ -5,6 +5,22 @@ module ActiveRecord
         :string
       end
 
+      def changed_in_place?(raw_old_value, new_value)
+        if new_value.is_a?(::String)
+          raw_old_value != new_value
+        end
+      end
+
+      def type_cast_for_database(value)
+        case value
+        when ::Numeric, ActiveSupport::Duration then value.to_s
+        when ::String then ::String.new(value)
+        when true then "t"
+        when false then "f"
+        else super
+        end
+      end
+
       def text?
         true
       end
@@ -13,9 +29,10 @@ module ActiveRecord
 
       def cast_value(value)
         case value
-        when true then "1"
-        when false then "0"
-        else value.to_s
+        when true then "t"
+        when false then "f"
+        # String.new is slightly faster than dup
+        else ::String.new(value.to_s)
         end
       end
     end