1 files changed, 8 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb
index 54d5d0902e..d85f9ab3ef 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
@@ -33,7 +35,7 @@ module ActiveRecord
             if value.is_a?(::Range)
               from = type_cast_single_for_database(value.begin)
               to = type_cast_single_for_database(value.end)
-              "[#{from},#{to}#{value.exclude_end? ? ')' : ']'}"
+              ::Range.new(from, to, value.exclude_end?)
             else
               super
             end
@@ -51,6 +53,10 @@ module ActiveRecord
             ::Range.new(new_begin, new_end, value.exclude_end?)
           end
 
+          def force_equality?(value)
+            value.is_a?(::Range)
+          end
+
           private
 
             def type_cast_single(value)
@@ -58,7 +64,7 @@ module ActiveRecord
             end
 
             def type_cast_single_for_database(value)
-              infinity?(value) ? "" : @subtype.serialize(value)
+              infinity?(value) ? value : @subtype.serialize(value)
             end
 
             def extract_bounds(value)