diff --git a/application/forms/IcingaHostForm.php b/application/forms/IcingaHostForm.php
index e19945ee..b611195c 100644
--- a/application/forms/IcingaHostForm.php
+++ b/application/forms/IcingaHostForm.php
@@ -283,24 +283,7 @@ class IcingaHostForm extends DirectorObjectForm
             return [];
         }
 
-        $db = $this->getDb()->getDbAdapter();
-        $query = $db->select()->from(
-            ['hghr' => 'icinga_hostgroup_host_resolved'],
-            ['hg.object_name']
-        )->join(
-            ['hg' => 'icinga_hostgroup'],
-            'hg.id = hghr.hostgroup_id',
-            []
-        )->joinLeft(
-            ['hgh' => 'icinga_hostgroup_host'],
-            'hgh.hostgroup_id = hghr.hostgroup_id',
-            []
-        )->where(
-            'hghr.host_id = ?',
-            $this->object()->get('id')
-        )->where('hgh.host_id IS NULL')->order('hg.object_name');
-
-        return $db->fetchCol($query);
+        return $this->object()->getAppliedGroups();
     }
 
     protected function hasHostGroupRestriction()
diff --git a/library/Director/Objects/IcingaObject.php b/library/Director/Objects/IcingaObject.php
index b47944b1..441907b9 100644
--- a/library/Director/Objects/IcingaObject.php
+++ b/library/Director/Objects/IcingaObject.php
@@ -853,6 +853,34 @@ abstract class IcingaObject extends DbObject implements IcingaConfigRenderer
 
         return $this->groups->hasBeenModified();
     }
+
+    public function getAppliedGroups()
+    {
+        $this->assertGroupsSupport();
+        if (! $this instanceof IcingaHost) {
+            throw new ProgrammingError('getAppliedGroups is only available for hosts currently!');
+        }
+
+        $type = strtolower($this->type);
+        $query = $this->db->select()->from(
+            ['gr' => "icinga_${type}group_${type}_resolved"],
+            ['g.object_name']
+        )->join(
+            ['g' => "icinga_${type}group"],
+            "g.id = gr.${type}group_id",
+            []
+        )->joinLeft(
+            ['go' => "icinga_${type}group_${type}"],
+            "go.${type}group_id = gr.${type}group_id",
+            []
+        )->where(
+            "gr.${type}_id = ?",
+            $this->id
+        )->where("go.${type}_id IS NULL")->order('g.object_name');
+
+        return $this->db->fetchCol($query);
+    }
+
     /**
      * @return IcingaTimePeriodRanges
      */