IMPORTANT: Making prev. Memcached_DataObject working again with schemaDef

Lots of the Memcached_DataObject classes stopped working when upgraded to
Managed_DataObject because they lacked schemaDef().

I have _hopefully_ made it so that all the references to the table uses
each class' schemaDef, rather than the more manual ColumnDef stuff. Not
all plugins have been tested thoroughly yet.

NOTE: This is applied with getKV calls instead of staticGet, as it was
important for PHP Strict Standards compliance to avoid calling the non-
static functions statically. (unfortunately DB and DB_DataObject still do
this within themselves...)

classes/User_username.php

@@ -19,6 +19,23 @@ class User_username extends Managed_DataObject
     /* the code above is auto generated do not remove the tag below */
     ###END_AUTOCODE
 
+    public static function schemaDef()
+    {
+        return array(
+            'fields' => array(
+                'provider_name' => array('type' => 'varchar', 'length' => 255, 'description' => 'provider name'),
+                'username' => array('type' => 'varchar', 'length' => 255, 'description' => 'username'),
+                'user_id' => array('type' => 'int', 'not null' => true, 'description' => 'notice id this title relates to'),
+                'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
+                'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
+            ),
+            'primary key' => array('provider_name', 'username'),
+            'foreign keys' => array(
+                'user_username_user_id_fkey' => array('user', array('user_id' => 'id')),
+            ),
+        );
+    }
+
     /**
     * Register a user with a username on a given provider
     * @param User User object
@@ -40,18 +57,4 @@ class User_username extends Managed_DataObject
             return false;
         }
     }
-
-    function table() {
-        return array(
-            'user_id'     => DB_DATAOBJECT_INT,
-            'username'   => DB_DATAOBJECT_STR,
-            'provider_name'   => DB_DATAOBJECT_STR ,
-            'created'   => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME
-        );
-    }
-
-    // now define the keys.
-    function keys() {
-        return array('provider_name' => 'K', 'username' => 'K');
-    }
 }