Rails app template: setup different mass assignment sanitizer for envs

For production - leave the default
For test and dev: :strict.

railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt

@@ -22,6 +22,9 @@
   # Only use best-standards-support built into browsers
   config.action_dispatch.best_standards_support = :builtin
 
+  # Raise exception on mass assignment protection for ActiveRecord models
+  config.active_record.mass_assignment_sanitizer = :strict
+
   # Do not compress assets
   config.assets.compress = false
 end

railties/lib/rails/generators/rails/app/templates/config/environments/test.rb.tt

@@ -34,6 +34,9 @@
   # like if you have constraints or database-specific column types
   # config.active_record.schema_format = :sql
 
+  # Raise exception on mass assignment protection for ActiveRecord models
+  config.active_record.mass_assignment_sanitizer = :strict
+
   # Print deprecation notices to the stderr
   config.active_support.deprecation = :stderr
 end