diff --git a/common/Factory/Model.php b/common/Factory/Model.php
index 6f43b40..b92cbc6 100644
--- a/common/Factory/Model.php
+++ b/common/Factory/Model.php
@@ -29,7 +29,7 @@ class Model {
         $model = $model->where([[$f, $v]]);
       }
       $model = $model->one();
-      if ($model !== false) {
+      if ($model !== null) {
         return $model;
       }
     }
@@ -345,7 +345,7 @@ class Model {
   public function one($id = null): ?ModelInterface {
     $result = $this->build()->findOne($id);
     if (!$result) {
-      return false;
+      return null;
     }
     $result->setFactory($this);
     return $result;
@@ -353,7 +353,7 @@ class Model {
   public function many(): ?array {
     $results = $this->build()->findMany();
     if (!$results) {
-      return false;
+      return null;
     }
     foreach ($results as &$r) {
       $r->setFactory($this);
@@ -363,7 +363,7 @@ class Model {
   public function array(): ?array {
     $results = $this->build()->findArray();
     if (!$results) {
-      return false;
+      return null;
     }
     return $results;
   }