N°2293 - API OnDBUpdate and AfterUpdate need modified fields and previous data

- add a getter for the protected property DBObject::$m_aChanges

application/applicationextension.inc.php

@@ -421,7 +421,7 @@ interface iApplicationObjectExtension
 	 * Invoked when an object is updated into the database. The method is called right <b>after</b> the object has been written to the
 	 * database.
 	 *
-	 * Changes made to the object can be get using {@link $oObject::$m_aChanges}. Do not call {@link \DBObject::ListChanges} for this purpose !
+	 * Changes made to the object can be get using {@link $oObject::ListChangesUpdated()}. Do not call {@link \DBObject::ListChanges} for this purpose because it will be empty as the object has already be written to DB!
 	 *
 	 * @param \cmdbAbstractObject $oObject The target object
 	 * @param CMDBChange|null $oChange A change context. Since 2.0 it is fine to ignore it, as the framework does maintain this information
@@ -429,7 +429,7 @@ interface iApplicationObjectExtension
 	 *
 	 * @return void
 	 *
-	 * @since 2.7.0 N°2293 can access object changes by calling {@link $oObject::$m_aChanges}
+	 * @since 2.7.0 N°2293 can access object changes by calling {@link $oObject::ListChangesUpdated()}
 	 */
 	public function OnDBUpdate($oObject, $oChange = null);
 

core/dbobject.class.php

@@ -2396,6 +2396,24 @@ abstract class DBObject implements iDisplay
 		}
 	}
 
+	/**
+	 * List the changed attributes that were persisted by an update.
+	 * 
+	 * @see \DBObject::ListChanges() use DBObject::ListChanges() if your code is BEFORE the update 
+	 * 
+	 * @return array
+	 */
+	public function ListChangesUpdated()
+	{
+		if (empty($this->m_aChanges))
+		{
+			return array();
+		}
+
+		return $this->m_aChanges;
+	}
+
+	
     /**
      * Whether or not an object was modified since last read from the DB
      * (ie: does it differ from the DB ?)