fix for #2236 + add new |nested filter

CHANGELOG.md

@@ -1,3 +1,11 @@
+# v1.8.13
+## mm/dd/2018
+
+1. [](#new)
+    * Added new `|nested()` Twig filter to access array objects with dot notation syntax
+1. [](#bugfix)
+    * Fixed issue with complex lists structure and nested dot-notation [#2236](https://github.com/getgrav/grav/issues/2236)
+
 # v1.8.12
 ## 10/24/2018
 

classes/Twig/AdminTwigExtension.php

@@ -31,6 +31,7 @@ class AdminTwigExtension extends \Twig_Extension
             new \Twig_SimpleFilter('toYaml', [$this, 'toYamlFilter']),
             new \Twig_SimpleFilter('fromYaml', [$this, 'fromYamlFilter']),
             new \Twig_SimpleFilter('adminNicetime', [$this, 'adminNicetimeFilter']),
+            new \Twig_SimpleFilter('nested', [$this, 'nestedFilter']),
         ];
     }
 
@@ -42,6 +43,23 @@ class AdminTwigExtension extends \Twig_Extension
         ];
     }
 
+    public function nestedFilter($current, $name)
+    {
+        $path = explode('.', trim($name, '.'));
+
+        foreach ($path as $field) {
+            if (is_object($current) && isset($current->{$field})) {
+                $current = $current->{$field};
+            } elseif (is_array($current) && isset($current[$field])) {
+                $current = $current[$field];
+            } else {
+                return null;
+            }
+        }
+
+        return $current;
+    }
+
     public function cloneFunc($obj)
     {
         return clone $obj;

themes/grav/templates/forms/fields/list/list.html.twig

@@ -77,7 +77,7 @@
                                 {% set childName = itemName -%}
                             {%- elseif childName starts with '.' -%}
                                 {% set childKey = childName|trim('.') %}
-                                {% set childValue = val[childName[1:]] %}
+                                {% set childValue = val|nested(childName) %}
                                 {% set childName = itemName ~ childName %}
                             {% else %}
                                 {% set childKey = childName %}