remove_hooks.js

orm.connect(config, function (error, db) {
  //Declare Variables
  var models = {};

  //Settings
  db.settings.set("properties.primary_key", "id");
  db.settings.set("instance.cache", false);
  db.settings.set("instance.autoSave", false);
  db.settings.set("instance.autoFetch", false);
  db.settings.set("instance.autoFetchLimit", 2);


  //Define Models
  models.users = db.define("users", {
    name: String,
    email: String
  });

  models.users.groups = db.define("users_group", {
    name: String,
    private: Boolean
  }, {
    hooks: {
      beforeRemove: function () {
        console.log("before remove");
      },
      afterRemove: function () {
        console.log("after remove");
      }
    }
  });


  //Create Associations
  models.users.groups.hasOne("owner", models.users);
  models.users.groups.hasMany("users", models.users, {}, {
    reverse: "groups",
    autoFetch: true
  });


  //Sync Models
  db.drop(function (err) {
    if (err) throw new Error(err);

    db.sync(function (err) {
      if (err) throw new Error(err);

      async.series([
        //Populate Models
        function (callback) {
          models.users.create({
            name: "Brian",
            email: "brian@laborate.io"
          }, function (err, user) {
            models.users.groups.create({
              name: "Friends",
              private: true
            }, function (err, group) {
              user.addGroups(group, callback);
            });
          });
        },
        //Update Information
        function (callback) {
          models.users.get(1, function(err, user) {
            if (err) throw new Error(err);

            user.save({
              name: "John Doe",
              email: "john@doe.com"
            }, function (err) {
              if (err) throw new Error(err);

              //Check If Group has User
              models.users.groups.get(1, function(err, group) {
                if (err) throw new Error(err);

                group.hasUsers(user, function (err, result) {
                  console.log(err, result);

                  callback();
                });
              });
            });
          });
        },
        // Test remove
        function (callback) {
          models.users.groups.get(1, function (err, group) {
            if (err) return callback(err);

            group.remove(callback);
          });
        }
      ], function (err) {
        console.log(err);

        //End Program
        process.exit(0);
      });
    });
  });
});