pg, `default_sequence_name` needs to return a string.

This is a reacon to https://github.com/rails/rails/commit/d6c1205584b1ba597db4071b168681678b1e9875#commitcomment-7502487
This backwards incompatibility was introduced with d6c12055 to fix #7516.
However both `connection.default_sequence_name` and `model.sequence_name` are public API.
The PostgreSQL adapter should honor the interface and return strings.

/cc @matthewd @chancancode

1 files changed, 2 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
index 323da7b717..767b6b614a 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
@@ -281,9 +281,9 @@ module ActiveRecord
         def default_sequence_name(table_name, pk = nil) #:nodoc:
           result = serial_sequence(table_name, pk || 'id')
           return nil unless result
-          Utils.extract_schema_qualified_name(result)
+          Utils.extract_schema_qualified_name(result).to_s
         rescue ActiveRecord::StatementInvalid
-          PostgreSQL::Name.new(nil, "#{table_name}_#{pk || 'id'}_seq")
+          PostgreSQL::Name.new(nil, "#{table_name}_#{pk || 'id'}_seq").to_s
         end
 
         def serial_sequence(table, column)