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Exceptions and Warnings

Manager exceptions

Doctrine_Manager_Exception is thrown if something failed at the connection management

try
{
    $manager->getConnection( 'unknown' );
}
catch ( Doctrine_Manager_Exception )
{
    // catch errors
}

Relation exceptions

Relation exceptions are being thrown if something failed during the relation parsing.

Connection exceptions

Connection exceptions are being thrown if something failed at the database level. Doctrine offers fully portable database error handling. This means that whether you are using sqlite or some other database you can always get portable error code and message for the occurred error.

try
{
    $conn->execute( 'SELECT * FROM unknowntable' );
}
catch ( Doctrine_Connection_Exception $e )
{
    echo 'Code : ' . $e->getPortableCode();
    echo 'Message : ' . $e->getPortableMessage();
}

Query exceptions

An exception will be thrown when a query is executed if the DQL query is invalid in some way.

Conclusion

Now that you know how to deal with Doctrine throwing exceptions lets move on and show you some real world schemas that would be used in common web applications found today on the web.