Do I really have to manually persist M:N associations in @SequelizeJS? https://github.com/distributeaid/shipment-tracker/commit/02b7380d99e59545a9f908086edbef841a481e74#diff-1790f0604d311e7e1a99f0a11fab999cb4ac59cf2359ff9bf42dc21257cb9294L212-R247

I am a bit surprised that I have to do this manually and Sequelize does not take care of persisting new associations itself ...