Merge pull request #27389 from kamipo/fix_mysql_pk_dumping_correctly

Restore the behaviour of the compatibility layer for integer-like PKs

* kamipo/fix_mysql_pk_dumping_correctly:
  Restore custom primary key tests lost at #26266
  Restore the behaviour of the compatibility layer for integer-like PKs
  Correctly dump integer-like primary key with default nil

1 files changed, 1 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb
index c3e182b43d..0443bd8bdd 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb
@@ -42,7 +42,7 @@ module ActiveRecord
         # a record (as primary keys cannot be +nil+). This might be done via the
         # +SecureRandom.uuid+ method and a +before_save+ callback, for instance.
         def primary_key(name, type = :primary_key, **options)
-          options[:auto_increment] = true if [:primary_key, :integer, :bigint].include?(type) && !options.key?(:default)
+          options[:auto_increment] = true if [:integer, :bigint].include?(type) && !options.key?(:default)
           if type == :uuid
             options[:default] = options.fetch(:default, "gen_random_uuid()")
           elsif options.delete(:auto_increment) == true && %i(integer bigint).include?(type)