Keep compatibility with Redmine 5

.github/workflows/master.yml

@@ -88,6 +88,7 @@ jobs:
       - name: Prepare Redmine source
         working-directory: redmine
         run: |
+          rm -f test/integration/routing/plugins_test.rb # Fix routing tests # TODO Remove this line when https://www.redmine.org/issues/38707 is fixed
           sed -i '/rubocop/d' Gemfile
           rm -f .rubocop*
           cp plugins/redmine_base_rspec/spec/support/database-${{ matrix.db }}.yml config/database.yml

init.rb

@@ -33,3 +33,9 @@
             :if => Proc.new {User.current.logged?}, :last => true
 end
 
+# Support for Redmine 5
+if Redmine::VERSION::MAJOR < 6
+  class ApplicationRecord < ActiveRecord::Base
+    self.abstract_class = true
+  end
+end