- WIP on migration and some bug fixes linked to withJoin() select problems

src/Entity/DatasetHandler.php

@@ -56,7 +56,10 @@ class DatasetHandler
             }
             elseif ( $field->expectType('array') ) {
                 if ( is_string($value)) {
-                    if (substr($value, 0, 1) === "a") {
+                    if (empty($value)) {
+                        yield $field->name => [];
+                    }
+                    elseif (substr($value, 0, 1) === "a") {
 
                         yield $field->name => unserialize($value);
                     }