2 files changed, 16 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/attribute.rb b/activerecord/lib/active_record/attribute.rb
index 701d24da88..9530f134d0 100644
--- a/activerecord/lib/active_record/attribute.rb
+++ b/activerecord/lib/active_record/attribute.rb
@@ -77,7 +77,11 @@ module ActiveRecord
     end
 
     def with_type(type)
-      self.class.new(name, value_before_type_cast, type, original_attribute)
+      if changed_in_place?
+        with_value_from_user(value).with_type(type)
+      else
+        self.class.new(name, value_before_type_cast, type, original_attribute)
+      end
     end
 
     def type_cast(*)
@@ -201,6 +205,8 @@ module ActiveRecord
     end
 
     class Uninitialized < Attribute # :nodoc:
+      UNINITIALIZED_ORIGINAL_VALUE = Object.new
+
       def initialize(name, type)
         super(name, nil, type)
       end
@@ -211,6 +217,10 @@ module ActiveRecord
         end
       end
 
+      def original_value
+        UNINITIALIZED_ORIGINAL_VALUE
+      end
+
       def value_for_database
       end
 
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
index bbb0e9249d..8dbafc5a4b 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
@@ -51,11 +51,12 @@ module ActiveRecord
         options[:primary_key] != default_primary_key
       end
 
-      def defined_for?(options_or_to_table = {})
-        if options_or_to_table.is_a?(Hash)
-          options_or_to_table.all? {|key, value| options[key].to_s == value.to_s }
+      def defined_for?(to_table_ord = nil, to_table: nil, **options)
+        if to_table_ord
+          self.to_table == to_table_ord.to_s
         else
-          to_table == options_or_to_table.to_s
+          (to_table.nil? || to_table.to_s == self.to_table) &&
+            options.all? { |k, v| self.options[k].to_s == v.to_s }
         end
       end