Ruby 3 and Rails 7 support

Author: rcugut

lib/polymorphic_integer_type/activerecord_5_0_0/polymorphic_array_value_extension.rb

@@ -29,7 +29,7 @@ def type_to_ids_mapping
 
           hash[key] << convert_to_id(value)
         else
-          hash[klass.polymorphic_name] << convert_to_id(value)
+          hash[klass(value)&.polymorphic_name] << convert_to_id(value)
         end
       end
     end

polymorphic_integer_type.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "activerecord", "< 7"
+  spec.add_dependency "activerecord"
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec"