fix(ActiveRecord): correctly connect to the database in Rails 7.2+

add active_record 7.2 to ci matrix

.github/workflows/test-postgresql.yml

@@ -10,6 +10,7 @@ jobs:
           - { ruby: 2.6.2, postgresql: 11, active_record: '~> 6.0.0' }
           - { ruby: 3.1.1, postgresql: 11, active_record: '~> 6.1.0' }
           - { ruby: 3.1.1, postgresql: 14, active_record: '~> 7.0.0' }
+          - { ruby: 3.1.1, postgresql: 14, active_record: '~> 7.2.0' }
     name: test (ruby=${{ matrix.entry.ruby }}, postgresql=${{ matrix.entry.postgresql }}, active_record=${{ matrix.entry.active_record }})
     steps:
       - uses: actions/checkout@v2

lib/slack-ruby-bot-server/config/database_adapters/activerecord.rb

@@ -6,7 +6,12 @@
 module SlackRubyBotServer
   module DatabaseAdapter
     def self.check!
-      ActiveRecord::Base.connection_pool.with_connection(&:active?)
+      if Gem::Version.new(ActiveRecord::VERSION::STRING) >= Gem::Version.new('7.2')
+        raise 'Database does not exist.' unless ActiveRecord::Base.connection.database_exists?
+      else
+        ActiveRecord::Base.connection_pool.with_connection(&:active?)
+      end
+
       raise 'Unexpected error.' unless ActiveRecord::Base.connected?
     rescue StandardError => e
       warn "Error connecting to PostgreSQL: #{e.message}"