feat(resource): Add childTemplate property for default child template

core/src/Revolution/Processors/Resource/Create.php

@@ -247,7 +247,9 @@ public function cleanup()
     public function setFieldDefaults()
     {
         $scriptProperties = $this->getProperties();
-        $scriptProperties['template'] = !isset($scriptProperties['template']) ? (int)$this->workingContext->getOption('default_template', 0) : (int)$scriptProperties['template'];
+        $scriptProperties['template'] = !isset($scriptProperties['template'])
+            ? $this->resolveDefaultTemplate()
+            : (int)$scriptProperties['template'];
         $scriptProperties['hidemenu'] = !isset($scriptProperties['hidemenu']) ? (int)$this->workingContext->getOption('hidemenu_default', 0) : (empty($scriptProperties['hidemenu']) ? 0 : 1);
         $scriptProperties['isfolder'] = empty($scriptProperties['isfolder']) ? 0 : 1;
         $scriptProperties['richtext'] = !isset($scriptProperties['richtext']) ? (int)$this->workingContext->getOption('richtext_default', 1) : (empty($scriptProperties['richtext']) ? 0 : 1);
@@ -315,6 +317,24 @@ public function setFieldDefaults()
         return true;
     }
 
+    /**
+     * Resolve default template for the new resource.
+     * Uses parent template's childTemplate property when present and valid; otherwise context default.
+     *
+     * @return int Template ID
+     */
+    protected function resolveDefaultTemplate(): int
+    {
+        $childTemplateId = $this->parentResource !== null
+            ? modTemplate::getChildTemplateId($this->parentResource)
+            : 0;
+        if ($childTemplateId > 0) {
+            return $childTemplateId;
+        }
+
+        return (int)$this->workingContext->getOption('default_template', 0);
+    }
+
     /**
      * Handle if parent is a context
      */

core/src/Revolution/modTemplate.php

@@ -224,6 +224,53 @@ public function getTemplateVarList(array $sort = ['name' => 'ASC'], $limit = 0,
         return $this->xpdo->call(modTemplate::class, 'listTemplateVars', [&$this, $sort, $limit, $offset, $conditions]);
     }
 
+    /**
+     * Get the template ID from the childTemplate property for a parent resource.
+     * Returns the template ID that should be used for child resources, or 0 if not set or invalid.
+     *
+     * @param modResource $parent The parent resource.
+     * @return int Template ID or 0 when not applicable.
+     */
+    public static function getChildTemplateId(modResource $parent): int
+    {
+        $xpdo = $parent->xpdo;
+        if (!$xpdo instanceof modX) {
+            return 0;
+        }
+
+        $parentTemplateId = (int)$parent->get('template');
+        if ($parentTemplateId <= 0) {
+            return 0;
+        }
+
+        $parentTemplate = $xpdo->getObject(modTemplate::class, $parentTemplateId);
+        if ($parentTemplate === null) {
+            return 0;
+        }
+
+        $properties = $parentTemplate->get('properties');
+        if (empty($properties) || !is_array($properties)) {
+            return 0;
+        }
+
+        $childTemplateProp = $properties['childTemplate'] ?? null;
+        $value = is_array($childTemplateProp) ? ($childTemplateProp['value'] ?? null) : $childTemplateProp;
+        if ($value === null || $value === '') {
+            return 0;
+        }
+
+        $templateId = (int)$value;
+        if ($templateId <= 0) {
+            return 0;
+        }
+
+        if ($xpdo->getCount(modTemplate::class, ['id' => $templateId]) === 0) {
+            return 0;
+        }
+
+        return $templateId;
+    }
+
     /**
      * Check to see if this Template is assigned the specified Template Var
      *

manager/controllers/default/resource/create.class.php

@@ -13,6 +13,7 @@
 use MODX\Revolution\modFormCustomizationProfileUserGroup;
 use MODX\Revolution\modFormCustomizationSet;
 use MODX\Revolution\modResource;
+use MODX\Revolution\modTemplate;
 use xPDO\Om\xPDOQuery;
 
 require_once __DIR__ . '/resource.class.php';
@@ -162,8 +163,11 @@
             $this->resourceArray = array_merge($this->resourceArray, $reloadData);
             $this->resourceArray['resourceGroups'] = [];
             $this->resourceArray['parents'] = $this->getParents();
-            $this->resourceArray['resource_groups'] = $this->modx->getOption('resource_groups',
-                $this->resourceArray, []);
+            $this->resourceArray['resource_groups'] = $this->modx->getOption(
+                'resource_groups',
+                $this->resourceArray,
+                []
+            );
             $this->resourceArray['resource_groups'] = is_array($this->resourceArray['resource_groups'])
                 ? $this->resourceArray['resource_groups']
                 : json_decode($this->resourceArray['resource_groups'], true);
@@ -224,31 +228,40 @@
         if (isset($this->scriptProperties['template'])) {
             $defaultTemplate = $this->scriptProperties['template'];
         } else {
-            switch ($this->context->getOption('automatic_template_assignment', 'parent', $this->modx->_userConfig)) {
-                case 'parent':
-                    if (!empty($this->parent->id))
-                        $defaultTemplate = $this->parent->get('template');
-                    break;
-                case 'sibling':
-                    if (!empty($this->parent->id)) {
-                        $c = $this->modx->newQuery(modResource::class);
-                        $c->where(['parent' => $this->parent->id, 'context_key' => $this->ctx]);
-                        $c->sortby('id', 'DESC');
-                        $c->limit(1);
-                        if ($siblings = $this->modx->getCollection(modResource::class, $c)) {
-                            /** @var modResource $sibling */
-                            foreach ($siblings as $sibling) {
-                                $defaultTemplate = $sibling->get('template');
+            $childTemplateId = $this->parent !== null
+                ? modTemplate::getChildTemplateId($this->parent)
+                : 0;
+            if ($childTemplateId > 0) {
+                $defaultTemplate = $childTemplateId;
+            } else {
+                switch ($this->context->getOption('automatic_template_assignment', 'parent', $this->modx->_userConfig)) {
+                    case 'parent':
+                        if (!empty($this->parent->id)) {
+                            $defaultTemplate = $this->parent->get('template');
+                        }
+                        break;
+                    case 'sibling':
+                        if (!empty($this->parent->id)) {
+                            $c = $this->modx->newQuery(modResource::class);
+                            $c->where(['parent' => $this->parent->id, 'context_key' => $this->ctx]);
+                            $c->sortby('id', 'DESC');
+                            $c->limit(1);
+                            if ($siblings = $this->modx->getCollection(modResource::class, $c)) {
+                                /** @var modResource $sibling */
+                                foreach ($siblings as $sibling) {
+                                    $defaultTemplate = $sibling->get('template');
+                                }
+                            } else {
+                                if (!empty($this->parent->id)) {
+                                    $defaultTemplate = $this->parent->get('template');
+                                }
                             }
-                        } else {
-                            if (!empty($this->parent->id))
-                                $defaultTemplate = $this->parent->get('template');
                         }
-                    }
-                    break;
-                case 'system':
-                    // already established
-                    break;
+                        break;
+                    case 'system':
+                        // already established
+                        break;
+                }
             }
         }
         $userGroups = $this->modx->user->getUserGroups();