From fcec026dff8fa7ee6c54aceda184c9721b7c0f78 Mon Sep 17 00:00:00 2001
From: Luke Towers <luke@luketowers.ca>
Date: Sun, 26 Aug 2018 12:29:37 -0600
Subject: [PATCH] Add support for checking if nested form fields are required
 for visual indicator

---
 modules/backend/widgets/Form.php | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/modules/backend/widgets/Form.php b/modules/backend/widgets/Form.php
index 4c0fffd32..01e96f23f 100644
--- a/modules/backend/widgets/Form.php
+++ b/modules/backend/widgets/Form.php
@@ -837,6 +837,24 @@ class Form extends WidgetBase
          */
         if ($field->required === null && $this->model && method_exists($this->model, 'isAttributeRequired')) {
             $fieldName = implode('.', HtmlHelper::nameToArray($field->fieldName));
+
+            // Check nested fields
+            if ($this->isNested) {
+                // Get the current attribute level
+                $nameArray = HtmlHelper::nameToArray($this->arrayName);
+                unset($nameArray[0]);
+
+                // Convert any numeric indexes to wildcards
+                foreach ($nameArray as $i => $value) {
+                    if (preg_match('/^[0-9]*$/', $value)) {
+                        $nameArray[$i] = '*';
+                    }
+                }
+
+                // Recombine names for full attribute name in rules array
+                $fieldName = implode('.', $nameArray) . ".{$fieldName}";
+            }
+
             $field->required = $this->model->isAttributeRequired($fieldName);
         }