1 files changed, 4 insertions, 0 deletions
diff --git a/Digitigrade/Model.php b/Digitigrade/Model.php
index b5c9e99..a065154 100644
--- a/Digitigrade/Model.php
+++ b/Digitigrade/Model.php
@@ -71,6 +71,10 @@ abstract class Model {
             } elseif (is_array($value)) {
                 // arrays ought to be handled separately when saving (different db table)
                 $discarded = true;
+            } elseif ($value == null && $pName == 'id') {
+                // don't overwrite an existing primary key with null ..
+                // this is kinda janky but it hopefully will work
+                $discarded = true;
             }
             if (!$discarded)
                 $result[self::mangleName($pName)] = $value;