Databases
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    <p>I think the error:</p> <blockquote> <p><strong>PersistenceException occured</strong> : <code>org.hibernate.HibernateException</code>: The database returned no natively generated identity value</p> </blockquote> <p>is occurred because there is <strong>no sequence</strong> in your database. If you extends <code>Model</code> class for your model and you are on <strong>Development</strong> mode, Play!Framework automatically generated sequence on your database named <code>hibernate_sequence</code>. The sequence is used to generated <strong>ID</strong> for your model. You may check your database to ensure that sequence is present.</p> <p>If the <code>hibernate_sequence</code> is present, you can insert data like you do before :</p> <pre><code>Notificacion notificacion = new Notificacion( filasConfiguracionClientes.get(i).imeiadmin,imei, "bateria baja" ).save(); </code></pre> <p>then, the error above should be resolved.</p> <hr> <blockquote> <h3>Note:</h3> <blockquote> <p>I am referring this answer if you used <strong>PostgreSQL</strong> database. If you use other database such as <strong>MySQL</strong>, you should define <code>AUTO_INCREMENT</code> on ID column as the sequence definition.</p> </blockquote> </blockquote> <hr> <h3>Update - I have tried this for H2 DB setting</h3> <p>Using <code>H2</code> database as configure in <code>application.conf</code> :</p> <pre><code># Development mode application.mode=dev # Set simple file written database (H2 file stored) db=fs # JPA DDL update for development purpose only jpa.ddl=update </code></pre> <h3>The controller :</h3> <pre><code>public static void test15878866() { // force to insert dummy data Notificacion notificacion = new Notificacion( 1L, 2L, "This is new notificacion" ).save(); renderText(notificacion.detalleNotificacion); } </code></pre> <h3>The model :</h3> <pre><code>@Entity public class Notificacion extends Model { public long imeiadmin; public long imeiclient; public String detalleNotificacion; public Notificacion(long imeiadmin, long imeiclient,String detalleNotificacion) { this.imeiadmin = imeiadmin; this.imeiclient = imeiclient; this.detalleNotificacion = detalleNotificacion; } } </code></pre>
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    1. COHi, thank you very much for your answer, I´m using now the systme file server like a database and I´m using the development mode in the conf file, but the error don´t dissapear. I don´t know where I can enabled hibernate_sequence. I will do a MySQL database for production but for development I preffer file system for testing. When I will do a MySQL database, where I will have to define AUTO_INCREMENT? Thanks!!!
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    2. COAre you use `SQLite` or `H2` database for development? I'm not familiar with `SQLite` but, if you use in-memory database like those and have extend your Model (`Notification.java`) with `Model` **not** `GenericModel`, the error should not appear. The sequence will be generated automatically. And then, for `MySQL` configuration for AUTO_INCREMENT you should follow this [tutorial](http://www.tutorialspoint.com/mysql/mysql-using-sequences.htm). Hope it can help you.
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    3. COYes I use H2 database for development and I extend my `Model` `Notification.java` with Model and no other ID only the ID autogenerated but the error continue appearing. It´s strange. Thanks you very much for your time.
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