diff --git a/demos/collection/multitable.php b/demos/collection/multitable.php
index 28535320de..b35e226665 100644
--- a/demos/collection/multitable.php
+++ b/demos/collection/multitable.php
@@ -23,6 +23,19 @@
 $finderClass = AnonymousClassNameCache::get_class(fn () => new class() extends Columns {
     public array $route = [];
 
+    /**
+     * @return list<mixed>
+     */
+    private function explodeSelectionValue(string $value): array
+    {
+        $res = [];
+        foreach ($value === '' ? [] : explode(',', $value) as $v) {
+            $res[] = $this->getApp()->uiPersistence->typecastLoadField($this->model->getField($this->model->idField), $v);
+        }
+
+        return $res;
+    }
+
     #[\Override]
     public function setModel(Model $model, array $route = []): void
     {
@@ -34,9 +47,9 @@ public function setModel(Model $model, array $route = []): void
         $table = Table::addTo($this->addColumn(), ['header' => false, 'class.very basic selectable' => true])->setStyle('cursor', 'pointer');
         $table->setModel($model, [$model->titleField]);
 
-        $selections = explode(',', $this->getApp()->tryGetRequestQueryParam($this->name) ?? '');
+        $selections = $this->explodeSelectionValue($this->getApp()->tryGetRequestQueryParam($this->name) ?? '');
 
-        if ($selections[0]) {
+        if ($selections !== []) {
             $table->js(true)->find('tr[data-id=' . $selections[0] . ']')->addClass('active');
         }
 
@@ -73,7 +86,7 @@ public function setModel(Model $model, array $route = []): void
             $table = Table::addTo($this->addColumn(), ['header' => false, 'class.very basic selectable' => true])->setStyle('cursor', 'pointer');
             $table->setModel($pushModel->setLimit(10), [$pushModel->titleField]);
 
-            if ($selections) {
+            if ($selections !== []) {
                 $table->js(true)->find('tr[data-id=' . $selections[0] . ']')->addClass('active');
             }
 
diff --git a/demos/form-control/input2.php b/demos/form-control/input2.php
index 83167a7c4f..19cc4a98b8 100644
--- a/demos/form-control/input2.php
+++ b/demos/form-control/input2.php
@@ -26,10 +26,10 @@
 $group->addControl('line_read', ['readOnly' => true])->set('read only');
 $group->addControl('line_disb', ['disabled' => true])->set('disabled');
 
-$group = $form->addGroup('Text Area');
-$group->addControl('text_norm', [Form\Control\Textarea::class])->set('editable');
-$group->addControl('text_read', [Form\Control\Textarea::class, 'readOnly' => true])->set('read only');
-$group->addControl('text_disb', [Form\Control\Textarea::class, 'disabled' => true])->set('disabled');
+$group = $form->addGroup('Textarea');
+$group->addControl('text_norm', [Form\Control\Textarea::class], ['type' => 'text'])->set("editable\nline2");
+$group->addControl('text_read', [Form\Control\Textarea::class, 'readOnly' => true], ['type' => 'text'])->set("read only\nline2");
+$group->addControl('text_disb', [Form\Control\Textarea::class, 'disabled' => true], ['type' => 'text'])->set("disabled\nline2");
 
 $group = $form->addGroup('Checkbox');
 $group->addControl('c_norm', [Form\Control\Checkbox::class], ['type' => 'boolean'])->set(true);
@@ -198,25 +198,3 @@
     ],
 ]));
 $r1->onChange(new JsExpression('console.log(\'radio changed\')'));
-
-Header::addTo($app, ['Line ends of Textarea']);
-
-$form = Form::addTo($app);
-$group = $form->addGroup('Without model');
-$group->addControl('text_crlf', [Form\Control\Textarea::class])->set("First line\r\nSecond line");
-$group->addControl('text_cr', [Form\Control\Textarea::class])->set("First line\rSecond line");
-$group->addControl('text_lf', [Form\Control\Textarea::class])->set("First line\nSecond line");
-
-$group = $form->addGroup('With model');
-$group->addControl('m_text_crlf', [Form\Control\Textarea::class], ['type' => 'text'])->set("First line\r\nSecond line");
-$group->addControl('m_text_cr', [Form\Control\Textarea::class], ['type' => 'text'])->set("First line\rSecond line");
-$group->addControl('m_text_lf', [Form\Control\Textarea::class], ['type' => 'text'])->set("First line\nSecond line");
-
-$form->onSubmit(static function (Form $form) {
-    // check what values are submitted
-    echo "We're URL encoding submitted values to be able to see what line end is actually submitted.";
-    foreach ($form->model->get() as $k => $v) {
-        var_dump([$k => urlencode($v)]);
-    }
-    echo 'As you can see - without model it submits CRLF, but with model it will normalize all to LF';
-});
diff --git a/demos/interactive/jssortable.php b/demos/interactive/jssortable.php
index d331b3e0af..43b97717e2 100644
--- a/demos/interactive/jssortable.php
+++ b/demos/interactive/jssortable.php
@@ -37,13 +37,13 @@
 
 $sortable = JsSortable::addTo($view, ['container' => 'ul', 'draggable' => 'li', 'dataLabel' => 'name']);
 
-$sortable->onReorder(static function (array $order, string $src, int $pos, int $oldPos) use ($app) {
+$sortable->onReorder(static function (array $orderedNames, string $sourceName, int $pos, int $oldPos) use ($app) {
     if ($app->tryGetRequestQueryParam('btn')) {
-        return new JsToast(implode(' - ', $order));
+        return new JsToast(implode(' - ', $orderedNames));
     }
 
-    return new JsToast($src . ' moved from position ' . $oldPos . ' to ' . $pos);
-});
+    return new JsToast($sourceName . ' moved from position ' . $oldPos . ' to ' . $pos);
+}, $model->getField($model->fieldName()->name));
 
 $button = Button::addTo($app)->set('Get countries order');
 $button->on('click', $sortable->jsSendSortOrders(['btn' => '1']));
@@ -57,6 +57,6 @@
 $grid->setModel((new Country($app->db))->setLimit(6));
 
 $dragHandler = $grid->addDragHandler();
-$dragHandler->onReorder(static function (array $order) {
-    return new JsToast('New order: ' . implode(' - ', $order));
+$dragHandler->onReorder(static function (array $orderedIds) use ($grid) {
+    return new JsToast('New order: ' . implode(' - ', array_map(static fn ($id) => $grid->getApp()->uiPersistence->typecastSaveField($grid->model->getField($grid->model->idField), $id), $orderedIds)));
 });
diff --git a/demos/interactive/loader2.php b/demos/interactive/loader2.php
index 4af21fb2d5..397680768b 100644
--- a/demos/interactive/loader2.php
+++ b/demos/interactive/loader2.php
@@ -30,7 +30,7 @@
 $grid->table->onRowClick($countryLoader->jsLoad(['id' => $grid->jsRow()->data('id')]));
 
 $countryLoader->set(static function (Loader $p) {
-    Form::addTo($p)->setModel(
-        (new Country($p->getApp()->db))->load($p->getApp()->getRequestQueryParam('id'))
-    );
+    $country = new Country($p->getApp()->db);
+    $id = $p->getApp()->uiPersistence->typecastLoadField($country->getField($country->idField), $p->getApp()->getRequestQueryParam('id'));
+    Form::addTo($p)->setModel($country->load($id));
 });
diff --git a/src/App.php b/src/App.php
index c3c0663eed..782cda73a4 100644
--- a/src/App.php
+++ b/src/App.php
@@ -409,10 +409,8 @@ public function tryGetRequestPostParam(string $key): ?string
 
     /**
      * Get the value of a specific POST parameter from the HTTP request.
-     *
-     * @return mixed
      */
-    public function getRequestPostParam(string $key)
+    public function getRequestPostParam(string $key): string
     {
         $res = $this->tryGetRequestPostParam($key);
         if ($res === null) {
diff --git a/src/Form.php b/src/Form.php
index 0058ce11b8..6673b38653 100644
--- a/src/Form.php
+++ b/src/Form.php
@@ -44,10 +44,8 @@ class Form extends View
     /**
      * HTML <form> element, all inner form controls are linked to it on render
      * with HTML form="form_id" attribute.
-     *
-     * @var View
      */
-    public $formElement;
+    public View $formElement;
 
     /** @var Form\Layout A current layout of a form, needed if you call Form->addControl(). */
     public $layout;
@@ -106,10 +104,10 @@ class Form extends View
      */
     public $controlDisplaySelector = '.field';
 
-    /** @var array Use this apiConfig variable to pass API settings to Fomantic-UI in .api(). */
+    /** @var array<string, mixed> Use this apiConfig variable to pass API settings to Fomantic-UI in .api(). */
     public $apiConfig = [];
 
-    /** @var array Use this formConfig variable to pass settings to Fomantic-UI in .from(). */
+    /** @var array<string, mixed> Use this formConfig variable to pass settings to Fomantic-UI in .from(). */
     public $formConfig = [];
 
     // {{{ Base Methods
@@ -491,7 +489,7 @@ public function fixOwningFormAttrInRenderedHtml(string $html): string
      * Set Fomantic-UI Api settings to use with form. A complete list is here:
      * https://fomantic-ui.com/behaviors/api.html#/settings .
      *
-     * @param array $config
+     * @param array<string, mixed> $config
      *
      * @return $this
      */
@@ -506,7 +504,7 @@ public function setApiConfig($config)
      * Set Fomantic-UI Form settings to use with form. A complete list is here:
      * https://fomantic-ui.com/behaviors/form.html#/settings .
      *
-     * @param array $config
+     * @param array<string, mixed> $config
      *
      * @return $this
      */
diff --git a/src/Form/Control.php b/src/Form/Control.php
index 81460e8b32..9624205f21 100644
--- a/src/Form/Control.php
+++ b/src/Form/Control.php
@@ -22,10 +22,10 @@
 class Control extends View
 {
     /** @var Form|null to which this field belongs */
-    public $form;
+    public ?View $form = null;
 
     /** @var EntityFieldPair<Model, Field>|null */
-    public $entityField;
+    public ?EntityFieldPair $entityField = null;
 
     /** @var string */
     public $controlClass = '';
@@ -70,7 +70,7 @@ protected function init(): void
     {
         parent::init();
 
-        if ($this->form && $this->entityField) {
+        if ($this->form !== null && $this->entityField !== null) {
             if (isset($this->form->controls[$this->entityField->getFieldName()])) {
                 throw (new Exception('Form field already exists'))
                     ->addMoreInfo('name', $this->entityField->getFieldName());
@@ -88,7 +88,7 @@ protected function init(): void
     #[\Override]
     public function set($value = null)
     {
-        if ($this->entityField) {
+        if ($this->entityField !== null) {
             $this->entityField->set($value);
         } else {
             $this->content = $value;
@@ -101,7 +101,7 @@ public function set($value = null)
     protected function renderView(): void
     {
         // it only makes sense to have "name" property inside a field if used inside a form
-        if ($this->form) {
+        if ($this->form !== null) {
             $this->template->trySet('name', $this->shortName);
         }
 
diff --git a/src/Form/Control/Checkbox.php b/src/Form/Control/Checkbox.php
index d1d4c46089..bd28de8779 100644
--- a/src/Form/Control/Checkbox.php
+++ b/src/Form/Control/Checkbox.php
@@ -37,7 +37,7 @@ protected function init(): void
         parent::init();
 
         // checkboxes are annoying because they don't send value when they are not ticked
-        if ($this->form) {
+        if ($this->form !== null) {
             $this->form->onHook(Form::HOOK_LOAD_POST, function (Form $form, array &$postRawData) {
                 if (!isset($postRawData[$this->shortName])) {
                     $postRawData[$this->shortName] = '0';
@@ -53,13 +53,13 @@ protected function renderView(): void
             $this->template->set('Content', $this->label);
         }
 
-        if ($this->entityField && !is_bool($this->entityField->get() ?? false)) {
+        if ($this->entityField !== null && !is_bool($this->entityField->get() ?? false)) {
             throw (new Exception('Checkbox form control requires field with boolean type'))
                 ->addMoreInfo('type', $this->entityField->getField()->type)
                 ->addMoreInfo('value', $this->entityField->get());
         }
 
-        if ($this->entityField ? $this->entityField->get() : $this->content) {
+        if ($this->entityField !== null ? $this->entityField->get() : $this->content) {
             $this->template->dangerouslySetHtml('checked', 'checked="checked"');
         }
 
diff --git a/src/Form/Control/Dropdown.php b/src/Form/Control/Dropdown.php
index 0611b89316..48b0ed5419 100644
--- a/src/Form/Control/Dropdown.php
+++ b/src/Form/Control/Dropdown.php
@@ -113,20 +113,17 @@ public function getValue()
     {
         // dropdown input tag accepts CSV formatted list of IDs
         return $this->entityField !== null
-            ? (is_array($this->entityField->get()) ? implode(', ', $this->entityField->get()) : $this->entityField->get())
+            ? (is_array($this->entityField->get()) ? implode(', ', $this->entityField->get()) : $this->entityField->get()) // TODO is_array() should be replaced with field type condition
             : parent::getValue();
     }
 
     #[\Override]
     public function set($value = null)
     {
-        if ($this->entityField) {
+        if ($this->entityField !== null) {
             if ($this->entityField->getField()->type === 'json' && is_string($value)) {
                 $value = explode(',', $value);
             }
-            $this->entityField->set($value);
-
-            return $this;
         }
 
         return parent::set($value);
diff --git a/src/Form/Control/Lookup.php b/src/Form/Control/Lookup.php
index 8dcebcad8c..82c7bd13dc 100644
--- a/src/Form/Control/Lookup.php
+++ b/src/Form/Control/Lookup.php
@@ -83,7 +83,7 @@ class Lookup extends Input
      *
      * Use this apiConfig variable to pass API settings to Fomantic-UI in .dropdown()
      *
-     * @var array
+     * @var array<string, mixed>
      */
     public $apiConfig = ['cache' => false];
 
@@ -334,7 +334,7 @@ protected function applyDependencyConditions(): void
         $data = [];
         if ($this->getApp()->hasRequestQueryParam('form')) {
             parse_str($this->getApp()->getRequestQueryParam('form'), $data);
-        } elseif ($this->form) {
+        } elseif ($this->form !== null) {
             $data = $this->form->model->get();
         } else {
             return;
@@ -386,7 +386,7 @@ protected function renderView(): void
 
         $this->initDropdown($chain);
 
-        if ($this->entityField && $this->entityField->get()) {
+        if ($this->entityField !== null && $this->entityField->get() !== null) {
             $idField = $this->idField ?? $this->model->idField;
 
             $this->model = $this->model->loadBy($idField, $this->entityField->get());
diff --git a/src/Form/Control/Radio.php b/src/Form/Control/Radio.php
index 5aa6f02020..d072566bde 100644
--- a/src/Form/Control/Radio.php
+++ b/src/Form/Control/Radio.php
@@ -26,7 +26,7 @@ protected function init(): void
         parent::init();
 
         // radios are annoying because they don't send value when they are not ticked
-        if ($this->form) {
+        if ($this->form !== null) {
             $this->form->onHook(Form::HOOK_LOAD_POST, function (Form $form, array &$postRawData) {
                 if (!isset($postRawData[$this->shortName])) {
                     $postRawData[$this->shortName] = '';
diff --git a/src/Form/Control/ScopeBuilder.php b/src/Form/Control/ScopeBuilder.php
index b4517b86c1..26e799a33c 100644
--- a/src/Form/Control/ScopeBuilder.php
+++ b/src/Form/Control/ScopeBuilder.php
@@ -272,7 +272,7 @@ protected function init(): void
 
         $this->scopeBuilderView = View::addTo($this, ['template' => $this->scopeBuilderTemplate]);
 
-        if ($this->form) {
+        if ($this->form !== null) {
             $this->form->onHook(Form::HOOK_LOAD_POST, function (Form $form, array &$postRawData) {
                 $key = $this->entityField->getFieldName();
                 $postRawData[$key] = $this->queryToScope($this->getApp()->decodeJson($postRawData[$key]));
@@ -312,7 +312,7 @@ protected function buildQuery(Model $model): void
         // this is used when selecting proper operator for the inputType (see self::$operatorsMap)
         $inputsMap = array_column($this->rules, 'inputType', 'id');
 
-        if ($this->entityField && $this->entityField->get() !== null) {
+        if ($this->entityField !== null && $this->entityField->get() !== null) {
             $scope = $this->entityField->get();
         } else {
             $scope = $model->scope();
diff --git a/src/Js/JsReload.php b/src/Js/JsReload.php
index 0e8737e372..1dd5647275 100644
--- a/src/Js/JsReload.php
+++ b/src/Js/JsReload.php
@@ -26,6 +26,8 @@ class JsReload implements JsExpressionable
     /**
      * Fomantic-UI api settings.
      * ex: ['loadingDuration' => 1000].
+     *
+     * @var array<string, mixed>
      */
     public array $apiConfig = [];
 
@@ -34,6 +36,7 @@ class JsReload implements JsExpressionable
 
     /**
      * @param array<string, string|int|JsExpressionable> $args
+     * @param array<string, mixed>                       $apiConfig
      */
     public function __construct(View $view, array $args = [], JsExpressionable $afterSuccess = null, array $apiConfig = [], bool $includeStorage = false)
     {
diff --git a/src/JsCallback.php b/src/JsCallback.php
index 2daf5fa261..186f8248d8 100644
--- a/src/JsCallback.php
+++ b/src/JsCallback.php
@@ -17,8 +17,8 @@ class JsCallback extends Callback
     /** @var string Text to display as a confirmation. Set with setConfirm(..). */
     public $confirm;
 
-    /** @var array|null Use this apiConfig variable to pass API settings to Fomantic-UI in .api(). */
-    public $apiConfig;
+    /** @var array<string, mixed> Use this apiConfig variable to pass API settings to Fomantic-UI in .api(). */
+    public $apiConfig = [];
 
     /** @var string|null Include web storage data item (key) value to be included in the request. */
     public $storeName;
@@ -41,7 +41,7 @@ public function jsExecute(): JsBlock
             'url' => $this->getJsUrl(),
             'urlOptions' => $this->args,
             'confirm' => $this->confirm,
-            'apiConfig' => $this->apiConfig,
+            'apiConfig' => $this->apiConfig !== [] ? $this->apiConfig : null,
             'storeName' => $this->storeName,
         ])]);
     }
diff --git a/src/JsSortable.php b/src/JsSortable.php
index dde6b24106..e47435d6e0 100644
--- a/src/JsSortable.php
+++ b/src/JsSortable.php
@@ -4,6 +4,7 @@
 
 namespace Atk4\Ui;
 
+use Atk4\Data\Field;
 use Atk4\Ui\Js\JsChain;
 use Atk4\Ui\Js\JsExpressionable;
 
@@ -65,17 +66,22 @@ protected function init(): void
     /**
      * Callback when container has been reorder.
      *
-     * @param \Closure(list<string>, string, int, int): (JsExpressionable|View|string|void) $fx
+     * @param \Closure(list<mixed>, mixed, int, int): (JsExpressionable|View|string|void) $fx
      */
-    public function onReorder(\Closure $fx): void
+    public function onReorder(\Closure $fx, Field $idField): void
     {
-        $this->set(function () use ($fx) {
-            $sortOrders = explode(',', $this->getApp()->getRequestPostParam('order'));
-            $source = $this->getApp()->getRequestPostParam('source');
+        $this->set(function () use ($fx, $idField) {
+            // TODO comma can be in the order/ID value
+            $orderedIds = explode(',', $this->getApp()->getRequestPostParam('order'));
+            $sourceId = $this->getApp()->getRequestPostParam('source');
             $newIndex = (int) $this->getApp()->getRequestPostParam('newIndex');
             $origIndex = (int) $this->getApp()->getRequestPostParam('origIndex');
 
-            return $fx($sortOrders, $source, $newIndex, $origIndex);
+            $typecastLoadIdFx = fn ($v) => $this->getApp()->uiPersistence->typecastLoadField($idField, $v);
+            $orderedIds = array_map($typecastLoadIdFx, $orderedIds);
+            $sourceId = $typecastLoadIdFx($sourceId);
+
+            return $fx($orderedIds, $sourceId, $newIndex, $origIndex);
         });
     }
 
diff --git a/src/Loader.php b/src/Loader.php
index 4c8d28c9d7..7b78ac2e93 100644
--- a/src/Loader.php
+++ b/src/Loader.php
@@ -114,7 +114,8 @@ protected function renderView(): void
     /**
      * Return a JS action that will trigger the loader to start.
      *
-     * @param string $storeName
+     * @param array<string, mixed> $apiConfig
+     * @param string               $storeName
      *
      * @return JsChain
      */
diff --git a/src/Table/Column/ActionButtons.php b/src/Table/Column/ActionButtons.php
index 0343df5036..8dc5adc181 100644
--- a/src/Table/Column/ActionButtons.php
+++ b/src/Table/Column/ActionButtons.php
@@ -100,7 +100,8 @@ public function addModal($button, $defaults, \Closure $callback, $owner = null,
         $modal = Modal::addTo($owner, $defaults);
 
         $modal->set(function (View $t) use ($callback) {
-            $callback($t, $t->stickyGet($this->name));
+            $id = $this->getApp()->uiPersistence->typecastLoadField($this->table->model->getField($this->table->model->idField), $t->stickyGet($this->name));
+            $callback($t, $id);
         });
 
         return $this->addButton($button, $modal->jsShow(array_merge([$this->name => $this->getOwner()->jsRow()->data('id')], $args)), '', $isDisabled);
diff --git a/src/Table/Column/DragHandler.php b/src/Table/Column/DragHandler.php
index 3ff67deaae..b3a6dbc0db 100644
--- a/src/Table/Column/DragHandler.php
+++ b/src/Table/Column/DragHandler.php
@@ -36,11 +36,11 @@ protected function init(): void
     /**
      * Callback when table has been reorder using handle.
      *
-     * @param \Closure(list<string>, string, int, int): (JsExpressionable|View|string|void) $fx
+     * @param \Closure(list<mixed>, mixed, int, int): (JsExpressionable|View|string|void) $fx
      */
     public function onReorder(\Closure $fx): void
     {
-        $this->cb->onReorder($fx);
+        $this->cb->onReorder($fx, $this->table->model->getField($this->table->model->idField));
     }
 
     #[\Override]
diff --git a/src/UserAction/FormExecutor.php b/src/UserAction/FormExecutor.php
index 22c85de9ba..84f8be888c 100644
--- a/src/UserAction/FormExecutor.php
+++ b/src/UserAction/FormExecutor.php
@@ -17,7 +17,7 @@ public function initPreview(): void
     {
         $this->addHeader();
 
-        if (!$this->form) {
+        if ($this->form === null) {
             $this->form = Form::addTo($this);
         }
 
diff --git a/src/View.php b/src/View.php
index de62624346..24124e8146 100644
--- a/src/View.php
+++ b/src/View.php
@@ -887,7 +887,7 @@ public function jsAddStoreData(array $data, bool $useSession = false): JsExpress
      *
      * @param array                 $args
      * @param JsExpressionable|null $afterSuccess
-     * @param array                 $apiConfig
+     * @param array<string, mixed>  $apiConfig
      *
      * @return JsReload
      */
diff --git a/tests-behat/loader.feature b/tests-behat/loader.feature
new file mode 100644
index 0000000000..bed75d0058
--- /dev/null
+++ b/tests-behat/loader.feature
@@ -0,0 +1,8 @@
+Feature: Loader
+
+  Scenario:
+    Given I am on "interactive/loader2.php"
+    When I click using selector "//td[text()='American Samoa']"
+    Then I check if input value for "input[name='atk_fp_country__iso3']" match text "ASM"
+    When I click using selector "//td[text()='Argentina']"
+    Then I check if input value for "input[name='atk_fp_country__iso3']" match text "ARG"