3 files changed, 4 insertions, 4 deletions
diff --git a/activerecord/lib/active_record/type/numeric.rb b/activerecord/lib/active_record/type/numeric.rb
index fa43266504..674f996f38 100644
--- a/activerecord/lib/active_record/type/numeric.rb
+++ b/activerecord/lib/active_record/type/numeric.rb
@@ -29,7 +29,7 @@ module ActiveRecord
         # 'wibble'.to_i will give zero, we want to make sure
         # that we aren't marking int zero to string zero as
         # changed.
-        value.to_s !~ /\A\d+\.?\d*\z/
+        value.to_s !~ /\A-?\d+\.?\d*\z/
       end
     end
   end
diff --git a/activerecord/lib/active_record/type/serialized.rb b/activerecord/lib/active_record/type/serialized.rb
index 3191a868ef..3cac03464e 100644
--- a/activerecord/lib/active_record/type/serialized.rb
+++ b/activerecord/lib/active_record/type/serialized.rb
@@ -29,7 +29,7 @@ module ActiveRecord
 
       def changed_in_place?(raw_old_value, value)
         return false if value.nil?
-        subtype.changed_in_place?(raw_old_value, coder.dump(value))
+        subtype.changed_in_place?(raw_old_value, type_cast_for_database(value))
       end
 
       def accessor
diff --git a/activerecord/lib/active_record/type/value.rb b/activerecord/lib/active_record/type/value.rb
index 9456a4a56c..75679b8692 100644
--- a/activerecord/lib/active_record/type/value.rb
+++ b/activerecord/lib/active_record/type/value.rb
@@ -91,8 +91,8 @@ module ActiveRecord
 
       # Convenience method for types which do not need separate type casting
       # behavior for user and database inputs. Called by
-      # `type_cast_from_database` and `type_cast_from_user` for all values
-      # except `nil`.
+      # +type_cast_from_database+ and +type_cast_from_user+ for all values
+      # except +nil+.
       def cast_value(value) # :doc:
         value
       end