From 5853cc54c4958989887cff5a5fe582b31045f150 Mon Sep 17 00:00:00 2001
From: Luke Towers <luke@luketowers.ca>
Date: Thu, 10 Jan 2019 17:39:41 -0600
Subject: [PATCH] Ensure that FormWidgets are correctly initialized with
 previewMode even on AJAX requests

---
 modules/backend/behaviors/FormController.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/backend/behaviors/FormController.php b/modules/backend/behaviors/FormController.php
index 24996b8f9..f93871226 100644
--- a/modules/backend/behaviors/FormController.php
+++ b/modules/backend/behaviors/FormController.php
@@ -139,6 +139,11 @@ class FormController extends ControllerBehavior
          */
         $this->formWidget = $this->makeWidget('Backend\Widgets\Form', $config);
 
+        // Setup the default preview mode on form initialization if the context is preview
+        if ($config->context === 'preview') {
+            $this->formWidget->previewMode = true;
+        }
+
         $this->formWidget->bindEvent('form.extendFieldsBefore', function () {
             $this->controller->formExtendFieldsBefore($this->formWidget);
         });