2 files changed, 26 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/properties.rb b/activerecord/lib/active_record/properties.rb
index a25c1cec58..aee1116511 100644
--- a/activerecord/lib/active_record/properties.rb
+++ b/activerecord/lib/active_record/properties.rb
@@ -4,6 +4,11 @@ module ActiveRecord
 
     Type = ConnectionAdapters::Type
 
+    included do
+      class_attribute :user_provided_columns, instance_accessor: false # :internal
+      self.user_provided_columns = {}
+    end
+
     module ClassMethods
       # Defines or overrides a property on this model. This allows customization of
       # Active Record's type casting behavior, as well as adding support for user defined
@@ -59,7 +64,8 @@ module ActiveRecord
       #   store_listing.price_in_cents # => 1000
       def property(name, cast_type)
         name = name.to_s
-        user_provided_columns[name] = ConnectionAdapters::Column.new(name, nil, cast_type)
+        # Assign a new hash to ensure that subclasses do not share a hash
+        self.user_provided_columns = user_provided_columns.merge(name => ConnectionAdapters::Column.new(name, nil, cast_type))
       end
 
       # Returns an array of column objects for the table associated with this class.
@@ -81,10 +87,6 @@ module ActiveRecord
 
       private
 
-      def user_provided_columns
-        @user_provided_columns ||= {}
-      end
-
       def add_user_provided_columns(schema_columns)
         schema_columns.reject { |column|
           user_provided_columns.key? column.name
diff --git a/activerecord/test/cases/custom_properties_test.rb b/activerecord/test/cases/custom_properties_test.rb
index 9598f0299c..9910e4042c 100644
--- a/activerecord/test/cases/custom_properties_test.rb
+++ b/activerecord/test/cases/custom_properties_test.rb
@@ -6,6 +6,13 @@ class OverloadedType < ActiveRecord::Base
   property :non_existent_decimal, Type::Decimal.new
 end
 
+class ChildOfOverloadedType < OverloadedType
+end
+
+class GrandchildOfOverloadedType < ChildOfOverloadedType
+  property :overloaded_float, Type::Float.new
+end
+
 class UnoverloadedType < ActiveRecord::Base
   self.table_name = 'overloaded_types'
 end
@@ -60,5 +67,17 @@ module ActiveRecord
       assert_nil data.overloaded_float
       assert unoverloaded_data.overloaded_float
     end
+
+    def test_children_inherit_custom_properties
+      data = ChildOfOverloadedType.new(overloaded_float: '4.4')
+
+      assert_equal 4, data.overloaded_float
+    end
+
+    def test_children_can_override_parents
+      data = GrandchildOfOverloadedType.new(overloaded_float: '4.4')
+
+      assert_equal 4.4, data.overloaded_float
+    end
   end
 end