Change Model values after load in Mongoose

Question

In my mongoose model, I have some stats that are dependent on time. My idea is to add a middleware to change these stats right after the model has been loaded.<

Answer 1

This is how we update models on load, working asynchronously:

schema.pre('init', function(next, data) {
  data.property = data.property || 'someDefault';
  next();
});

Pre-init is special, the other hooks have a slightly different signature, for example pre-save:

schema.pre('save', function(next) {
  this.accessed_ts = Date.now();
  next();
});