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

ci: add active_record 7.2 to ci matrix
deps: pin pagy_cursor to prevent incompatible version
deps: pin activerecord 7.2+ compatible version of database_cleaner

ran into DatabaseCleaner/database_cleaner-active_record#83

.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

CHANGELOG.md

@@ -3,6 +3,7 @@
 ### 2.1.2 (Next)
 
 * Your contribution here.
+* [#175](https://github.com/slack-ruby/slack-ruby-bot-server/pull/175): Fix(activerecord): correctly check for database in rails 7.2+ - [@markokajzer](https://github.com/markokajzer).
 
 ### 2.1.1 (2023/07/25)
 

Gemfile

@@ -9,7 +9,7 @@ when 'mongoid' then
 when 'activerecord' then
   gem 'activerecord', ENV['ACTIVERECORD_VERSION'] || '~> 6.0.0'
   gem 'otr-activerecord'
-  gem 'pagy_cursor'
+  gem 'pagy_cursor', '~> 0.6.1'
   gem 'pg'
 when nil
   warn "Missing ENV['DATABASE_ADAPTER']."
@@ -23,7 +23,7 @@ group :development, :test do
   gem 'bundler'
   gem 'byebug'
   gem 'capybara', '~> 3.36.0'
-  gem 'database_cleaner', '~> 1.8.5'
+  gem 'database_cleaner', '~> 2.1.0'
   gem 'fabrication'
   gem 'faker'
   gem 'faraday', '0.17.5'

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 ActiveRecord.version >= Gem::Version.new('7.2')
+        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}"

spec/slack-ruby-bot-server/app_spec.rb

@@ -13,6 +13,46 @@
       expect(app.instance).to be_an_instance_of(app)
     end
   end
+  context '#prepare!' do
+    context 'when connection cannot be established' do
+      context 'with ActiveRecord >= 7.2' do
+        before do
+          skip 'incorrect ActiveRecord version' if ActiveRecord.version < Gem::Version.new('7.2')
+
+          # Make sure ActiveRecord is not connected in any way before the spec starts
+          ActiveRecord::Base.connection_pool.disconnect!
+        end
+
+        after do
+          skip 'incorrect ActiveRecord version' if ActiveRecord.version < Gem::Version.new('7.2')
+
+          RSpec::Mocks.space.proxy_for(ActiveRecord::Base).reset
+          ActiveRecord::Base.connection.reconnect!
+        end
+
+        it 'raises' do
+          # Simulate that #database_exists? does not connect to the database
+          allow(ActiveRecord::Base).to receive_message_chain(:connection, :database_exists?)
+          expect { subject.prepare! }
+            .to raise_error('Unexpected error.')
+        end
+      end
+
+      context 'with ActiveRecord < 7.2' do
+        before do
+          skip 'incorrect ActiveRecord version' if ActiveRecord.version >= Gem::Version.new('7.2')
+        end
+
+        it 'raises' do
+          # In ActiveRecord < 7.1, `disconnect!` + `reconnect!` closes the connection that has already been leased by
+          #   DatabaseCleaner, so we cannot do that trick here to simulate a not established connection.
+          allow(ActiveRecord::Base).to receive(:connected?).and_return(false)
+          expect { subject.prepare! }
+            .to raise_error('Unexpected error.')
+        end
+      end
+    end
+  end
   context '#purge_inactive_teams!' do
     it 'purges teams' do
       expect(Team).to receive(:purge!)