initial commit

kirby/config/sections/mixins/parent.php

@@ -0,0 +1,43 @@
+<?php
+
+use Kirby\Exception\Exception;
+
+return [
+    'props' => [
+        /**
+         * Sets the query to a parent to find items for the list
+         */
+        'parent' => function (string $parent = null) {
+            return $parent;
+        }
+    ],
+    'methods' => [
+        'parentModel' => function () {
+            $parent = $this->parent;
+
+            if (is_string($parent) === true) {
+                $query  = $parent;
+                $parent = $this->model->query($query);
+
+                if (!$parent) {
+                    throw new Exception('The parent for the query "' . $query . '" cannot be found in the section "' . $this->name() . '"');
+                }
+
+                if (
+                    is_a($parent, 'Kirby\Cms\Page') === false &&
+                    is_a($parent, 'Kirby\Cms\Site') === false &&
+                    is_a($parent, 'Kirby\Cms\File') === false &&
+                    is_a($parent, 'Kirby\Cms\User') === false
+                ) {
+                    throw new Exception('The parent for the section "' . $this->name() . '" has to be a page, site or user object');
+                }
+            }
+
+            if ($parent === null) {
+                return $this->model;
+            }
+
+            return $parent;
+        }
+    ]
+];