fixed docs related to seSubclasses/setInheritanceMap

manual/new/docs/en/mapping-relations.txt

@@ -342,7 +342,8 @@ In the following example we have one database table called {{entity}}. Users and
 
 The entity table has a column called {{type}} which tells whether an entity is a group or a user. Then we decide that users are type 1 and groups type 2.
 
-The only thing we have to do is to create 3 records (the same as before) and add call the {{Doctrine_Table::setInheritanceMap()}} method inside the {{setUp()}} method.
+The only thing we have to do is to create 3 records (the same as before) and add
+call the {{Doctrine_Table::setSubclasses()}} method from the parent class.
 
 <code type="php">
 class Entity extends Doctrine_Record 
@@ -357,63 +358,19 @@ class Entity extends Doctrine_Record
         // this column is used for column
         // aggregation inheritance
         $this->hasColumn('type', 'integer', 11);
+        $this->setSubclasses("User" => array("type => 1"), "Group" =>
+        array("type" => 2));
     }
 }
 
-class User extends Entity 
-{
-    public function setUp() 
-    {
-        $this->setInheritanceMap(array('type'=>1));
-    }
-}
+class User extends Entity {}
+class Group extends Entity {}
 
-class Group extends Entity 
-{
-    public function setUp() 
-    {
-        $this->setInheritanceMap(array('type'=>2));
-    }
-}
 </code>
 
-If we want to be able to fetch a record from the {{Entity}} table and automatically get a {{User}} record if the {{Entity}} we fetched is a user we have to do set the subclasses option in the parent class. The adjusted example:
-
-<code type="php">
-class Entity extends Doctrine_Record 
-{
-    public function setTableDefinition() 
-    {
-        $this->hasColumn('name', 'string', 30);
-        $this->hasColumn('username', 'string', 20);
-        $this->hasColumn('password', 'string', 16);
-        $this->hasColumn('created', 'integer', 11);
-
-        // this column is used for column
-        // aggregation inheritance
-        $this->hasColumn('type', 'integer', 11);
-        $this->option('subclasses', array('User', 'Group'));
-    }
-}
-
-class User extends Entity 
-{
-    public function setUp() 
-    {
-        $this->setInheritanceMap(array('type'=>1));
-    }
-}
-
-class Group extends Entity 
-{
-    public function setUp() 
-    {
-        $this->setInheritanceMap(array('type'=>2));
-    }
-}
-</code>
-
-We can then do the following given the previous table mapping.
+This feature also enable us to query the {{Entity}} table and get a {{User}} or
+{{Group}} object back if the returned object matches the constraints set in the
+parent class. See the code example below for an example of this.
 
 <code type="php">
 $user = new User();
@@ -430,13 +387,13 @@ $group->save();
 
 $q = new Doctrine_Query();
 $user = $q->from('Entity')->where('id=?')->execute(array($user->id))->getFirst();
+assert($user instanceOf User);
 
 $q = new Doctrine_Query();
 $group = $q->from('Entity')->where('id=?')->execute(array($group->id))->getFirst();
+assert($group instanceOf Group);
 </code>
 
-The user object is here an instance of {{User}} while the group object is an instance of {{Group}}.
-
 ++ Foreign key constraints
 +++ Introduction