Properly handle assignments in case of serial data

Search query should check assignment status only for pages, but not serial data.

Fixes cosmocode#666

Author: annda

meta/Assignments.php

@@ -5,7 +5,9 @@
 /**
  * Class Assignments
  *
- * Manages the assignment of schemas (table names) to pages and namespaces
+ * Manages the assignment of schemas (table names) to pages and namespaces.
+ * An assignment is created when actual struct data is attached to the page.
+ * Assignment are never deleted, only their "assigned" status is changed.
  *
  * This is a singleton. Assignment data is only loaded once per request.
  *

meta/SearchSQLBuilder.php

@@ -47,7 +47,8 @@ public function addSchemas($schemas)
                 $subOr = $subAnd->whereSubOr();
                 $subOr->whereAnd("GETACCESSLEVEL($datatable.pid) > 0");
                 $subOr->whereAnd("PAGEEXISTS($datatable.pid) = 1");
-                $subOr->whereAnd('(ASSIGNED = 1 OR ASSIGNED IS NULL)');
+                // make sure to check assignment for page data only
+                $subOr->whereAnd("($datatable.rid != 0 OR (ASSIGNED = 1 OR ASSIGNED IS NULL))");
 
                 // add conditional schema assignment check
                 $this->qb->addLeftJoin(