Add the following line (actually just uncomment out) to:
config.frameworks -= [ :active_record, :active_resource, :action_mailer ]
Comment out the following in
# Only save the attributes that have changed since the record was loaded.
#ActiveRecord::Base.partial_updates = true
# Include ActiveRecord class name as root for JSON serialized output.
#ActiveRecord::Base.include_root_in_json = true
# Use ISO 8601 format for JSON serialized times and dates
#ActiveSupport.use_standard_json_time_format = true