Middleware

Alexey Gordeyev edited this page Apr 9, 2015 · 3 revisions

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Middleware (Hooks)

The following callbacks supported:

- afterInitialize
- beforeCreate
- afterCreate
- beforeSave
- afterSave
- beforeUpdate
- afterUpdate
- beforeDestroy
- afterDestroy
- beforeValidation
- afterValidation
User.afterUpdate = function (next) {
    this.updated_ts = new Date();
    this.save();
    // Pass control to the next
    next();
};

Each callback is class method of the model, it should accept single argument: next, this is callback which should be called after end of the hook. Except afterInitialize because this method is syncronous (called after new Model).

Object lifecycle:

var user = new User;
// afterInitialize
user.save(callback);
// beforeValidation
// afterValidation
// beforeSave
// beforeCreate
// afterCreate
// afterSave
// callback
user.updateAttribute('email', 'email@example.com', callback);
// beforeValidation
// afterValidation
// beforeUpdate
// afterUpdate
// callback
user.destroy(callback);
// beforeDestroy
// afterDestroy
// callback
User.create(data, callback);
// beforeValidate
// afterValidate
// beforeCreate
// afterCreate
// callback

Read the tests for usage examples: ./test/common_test.js Validations: ./test/validations_test.js