diff --git a/demos/form-control/multiline.php b/demos/form-control/multiline.php
index 399cb50ab0..d5a605c9f1 100644
--- a/demos/form-control/multiline.php
+++ b/demos/form-control/multiline.php
@@ -60,7 +60,7 @@ protected function init(): void
         ]);
         $this->addExpression('total', [
             'expr' => function (Model $row) {
-                return $row->get('qty') * $row->get('box');
+                return $row->expr('[qty] * [box]'); // @phpstan-ignore-line
             },
             'type' => 'integer',
             'ui' => ['multiline' => [Form\Control\Multiline::TABLE_CELL => ['width' => 1, 'class' => 'blue']]],
@@ -68,11 +68,20 @@ protected function init(): void
     }
 });
 
-$inventory = new $inventoryItemClass(new Persistence\Array_(), ['countryPersistence' => $app->db]);
+$inventory = new $inventoryItemClass($app->db, ['table' => 'atk4_ui_multiline_test', 'countryPersistence' => $app->db]);
+
+$migrator = new \Atk4\Data\Schema\Migrator($inventory);
+if (!$migrator->isTableExists($inventory->table)) {
+    $migrator->create();
+}
 
 // Populate some data.
 $total = 0;
 for ($i = 1; $i < 3; ++$i) {
+    if ($inventory->tryLoad($i) !== null) {
+        continue;
+    }
+
     $entity = $inventory->createEntity();
     $entity->set('id', $i);
     $entity->set('inv_date', new \DateTime());
diff --git a/src/Form/Control/Multiline.php b/src/Form/Control/Multiline.php
index 4566b163c9..5aa6979be2 100644
--- a/src/Form/Control/Multiline.php
+++ b/src/Form/Control/Multiline.php
@@ -763,22 +763,27 @@ private function setDummyModelValue(Model $model): Model
      */
     private function getExpressionValues(Model $model): array
     {
-        $dummyFields = [];
+        $dummyFields = $this->getExpressionFields($model);
         $formatValues = [];
 
-        foreach ($this->getExpressionFields($model) as $k => $field) {
+        foreach ($dummyFields as $k => $field) {
             if (!is_callable($field->expr)) {
-                $dummyFields[$k]['name'] = $field->shortName;
-                $dummyFields[$k]['expr'] = $this->getDummyExpression($field, $model);
+                $dummyFields[$k]->shortName = $field->shortName; // copy name to the same object?
+                $dummyFields[$k]->expr = $this->getDummyExpression($field, $model);
             }
         }
 
         if ($dummyFields !== []) {
             $dummyModel = new Model($model->getPersistence(), ['table' => $model->table]);
+            foreach ($model->getFields() as $field) {
+                if ($field->shortName !== 'id' && !isset($dummyFields[$field->shortName])) {
+                    $dummyModel->addField($field->shortName, ['type' => $field->type]);
+                }
+            }
             foreach ($dummyFields as $field) {
-                $dummyModel->addExpression($field['name'], ['expr' => $field['expr'], 'type' => $model->getField($field['name'])->type]);
+                $dummyModel->addExpression($field->shortName, ['expr' => $field->expr, 'type' => $model->getField($field->shortName)->type]);
             }
-            $values = $dummyModel->loadAny()->get();
+            $values = $dummyModel->loadOne()->get();
             unset($values[$model->idField]);
 
             foreach ($values as $f => $value) {
@@ -797,6 +802,8 @@ private function getExpressionValues(Model $model): array
      *
      * Get all field expression in model, but only evaluate expression used in
      * rowFields.
+     *
+     * @return array<string, SqlExpressionField>
      */
     private function getExpressionFields(Model $model): array
     {
@@ -806,7 +813,7 @@ private function getExpressionFields(Model $model): array
                 continue;
             }
 
-            $fields[] = $field;
+            $fields[$field->shortName] = $field;
         }
 
         return $fields;