9 May 2015 Model definitions contain attributes , validations , instance methods , lifecycle There might be times when you want to use an existing database in your models. Automatically add a createdAt date attribute to the model.
A Drupal schema definition is an array structure representing one or more tables and 'not null': If true, no NULL values will be allowed in this database column. .. It would be helpful to provide some examples/clarification of date and time