The way to hook db-interactions on the server
First you should require the package and init it:
server.js
// Add 'hook' and 'onQuery' functions to the backend
require('sharedb-hooks')(backend);
// ...then you can use the function to hook model events, for example:
backend.hook('create', 'todos', function(docId, value, session, backend) {
model = backend.createModel();
model.fetch ('todos.'+docId, function(err){
var time = +new Date();
model.set('todos.'+docId+'.ctime', time);
})
});
backend.hook('change', 'users.*.location', function(docId, value, op, session, backend){
model = backend.createModel()
console.log('User change location HOOK');
// ....
});
backend.hook('del', 'todos', function(docId, value, session, backend) {
model = backend.createModel();
// ....
});