Author: Frederik Holljen
Date: 2007-02-09 08:07:09 +0100 (Fri, 09 Feb 2007)
New Revision: 4642
Log:
- updated tutorial
Modified:
trunk/PersistentObject/docs/tutorial.txt
Modified: trunk/PersistentObject/docs/tutorial.txt
===================================================================
--- trunk/PersistentObject/docs/tutorial.txt 2007-02-08 20:04:26 UTC (rev
4641)
+++ trunk/PersistentObject/docs/tutorial.txt 2007-02-09 07:07:09 UTC (rev
4642)
@@ -11,7 +11,10 @@
inheritance structure to work.
PersistentObject is built to be fast and flexible, allowing you to build
-persistent classes in the same way as any other class in your application.
+persistent classes in the same way as any other class in your application. It
+also utilizes the query abstraction layer of the Database component to make it
+easy to build queries. Please refer to the API documentation of ezcDatabase for
+detailed examples on how to use the query abstraction layer.
The PersistentObjectDatabaseSchemaTiein component allows you to automatically
generate the definition files needed by PersistentObject from a database schema
@@ -247,7 +250,7 @@
The find() method will fetch the complete result set and instantiate it for
you. This is not desirable if you are fetching large numbers of objects and you
-want it to be fast and efficient. For this you can use the fetchIterator()
+want it to be fast and efficient. For this you can use the findIterator()
method: ::
<?php
@@ -267,6 +270,23 @@
only one object will be instantiated and the data will be transferred from the
database only when it is needed.
+The final example uses a find query with a logical and to find objects: ::
+
+ <?php
+ $q = $session->createFindQuery( 'Person' );
+ $q->where(
+ $q->expr->lAnd(
+ $q->expr->eq( 'name', $q->bindValue( 'Guybrush Threepwood' ) ),
+ $q->expr->eq( 'age', $q->bindValue( 25 ) )
+ )
+ );
+ $objects = $session->findIterator( $q, 'Person' );
+ foreach( $objects as $object )
+ {
+ // ...
+ }
+ ?>
+
Deleting objects
-----------------
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