diff --git a/src/Dblayeroo.php b/src/Dblayeroo.php
index 509473e..6b81c0f 100644
--- a/src/Dblayeroo.php
+++ b/src/Dblayeroo.php
@@ -1466,7 +1466,7 @@ class Dblayeroo
                     $this->DBException("Parameter foreign invalid: " .
                               "ParentField is not provided");
                 }
-                if (! is_string($params[0])) {
+                if (! is_string($params[0]) && ! is_object($params[0])) {
                     $this->DBException("Parameter foreign invalid: " .
                               "parameter 0 is not a string");
                 }
@@ -1474,7 +1474,7 @@ class Dblayeroo
                     $this->DBException("Parameter foreign invalid: " .
                               "parameter 1 is not a string");
                 }
-                if (mb_strlen($params[0]) > 64) {
+                if (is_string($params[0]) && mb_strlen($params[0]) > 64) {
                     $this->DBException("Parameter foreign invalid: " .
                               "parameter 0 is too long");
                 }
@@ -3351,6 +3351,9 @@ class Dblayeroo
                     );
                     continue;
                 }
+                if (is_object($params[0])) {
+                    $params[0] = $params[0]->tableprefix . $params[0]->table;
+                }
                 if (! array_key_exists($params[0], $this->setForeignObj)) {
                     $this->DBException(sprintf(dgettext(
                         "domframework",