Use ActiveRecord.timestamped_migrations (#352)

* Remove duplicate method in InstallGenerator

There's no need to call `inject_sorcery_to_model` in the previous method, since the generators execute all public methods in order.

* Update CHANGELOG.md

* Use ActiveRecord.timestamped_migrations

Replace ActiveRecord::Base.timestamped_migrations with the newer ActiveRecord.timestamped_migrations

* Update CHANGELOG.md

* Improve compatibility

* Fix method scope

---------

Co-authored-by: Josh Buker <[email protected]>

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Changelog
 ## HEAD
 
+* Fix Rails 7.1 compatibility by using `ActiveRecord.timestamped_migrations` [#352](https://github.com/Sorcery/sorcery/pull/352)
 * Change CI settings for support Ruby3.0+ Rails6.1+ [#357](https://github.com/Sorcery/sorcery/pull/357)
 * Fix error when running the install generator [#339](https://github.com/Sorcery/sorcery/pull/339)
 

lib/generators/sorcery/install_generator.rb

@@ -74,7 +74,7 @@ def copy_migration_files
 
       # Define the next_migration_number method (necessary for the migration_template method to work)
       def self.next_migration_number(dirname)
-        if ActiveRecord::Base.timestamped_migrations
+        if timestamped_migrations?
           sleep 1 # make sure each time we get a different timestamp
           Time.new.utc.strftime('%Y%m%d%H%M%S')
         else
@@ -84,6 +84,14 @@ def self.next_migration_number(dirname)
 
       private
 
+      def self.timestamped_migrations?
+        if Rails::VERSION::MAJOR >= 7
+          ActiveRecord.timestamped_migrations
+        else
+          ActiveRecord::Base.timestamped_migrations
+        end
+      end
+
       def only_submodules?
         options[:migrations] || options[:only_submodules]
       end