Generate ApplicationRecord if it does not already exist

2 files changed, 11 insertions, 0 deletions

diff --git a/activerecord/lib/rails/generators/active_record/model/model_generator.rb b/activerecord/lib/rails/generators/active_record/model/model_generator.rb
index 7395839fca..09d3e7d9b9 100644
--- a/activerecord/lib/rails/generators/active_record/model/model_generator.rb
+++ b/activerecord/lib/rails/generators/active_record/model/model_generator.rb
@@ -22,11 +22,13 @@ module ActiveRecord
 
       def create_model_file
         template 'model.rb', File.join('app/models', class_path, "#{file_name}.rb")
+        generate_application_record
       end
 
       def create_module_file
         return if regular_class_path.empty?
         template 'module.rb', File.join('app/models', "#{class_path.join('/')}.rb") if behavior == :invoke
+        generate_application_record
       end
 
       hook_for :test_framework
@@ -37,6 +39,12 @@ module ActiveRecord
           attributes.select { |a| !a.reference? && a.has_index? }
         end
 
+        def generate_application_record
+          if self.behavior == :invoke && !File.exist?('app/models/application_record.rb')
+            template 'application_record.rb', 'app/models/application_record.rb'
+          end
+        end
+
         # Used by the migration template to determine the parent name of the model
         def parent_class_name
           options[:parent] || determine_default_parent_class
diff --git a/activerecord/lib/rails/generators/active_record/model/templates/application_record.rb b/activerecord/lib/rails/generators/active_record/model/templates/application_record.rb
new file mode 100644
index 0000000000..10a4cba84d
--- /dev/null
+++ b/activerecord/lib/rails/generators/active_record/model/templates/application_record.rb
@@ -0,0 +1,3 @@
+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end