Merge pull request rails#27997 from kamipo/should_keep_pk_column_order

Should keep the primary key column order

Author: eileencodes

activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb

@@ -441,6 +441,7 @@ def primary_keys(table_name) # :nodoc:
              WHERE constraint_type = 'PRIMARY KEY'
                AND kcu.table_name = #{quote(name.identifier)}
                AND kcu.table_schema = #{name.schema ? quote(name.schema) : "ANY (current_schemas(false))"}
+             ORDER BY kcu.ordinal_position
           SQL
         end