Add blueprints and fake content

kirby/config/fields/mixins/layout.php

@@ -0,0 +1,21 @@
+<?php
+
+return [
+    'props' => [
+        /**
+         * Changes the layout of the selected entries.
+         * Available layouts: `list`, `cardlets`, `cards`
+         */
+        'layout' => function (string $layout = 'list') {
+            $layouts = ['list', 'cardlets', 'cards'];
+            return in_array($layout, $layouts) ? $layout : 'list';
+        },
+
+        /**
+         * Layout size for cards: `tiny`, `small`, `medium`, `large` or `huge`
+         */
+        'size' => function (string $size = 'auto') {
+            return $size;
+        },
+    ]
+];

kirby/config/fields/mixins/upload.php

@@ -27,6 +27,7 @@ return [
             if ($template) {
                 $file = new File([
                     'filename' => 'tmp',
+                    'parent'   => $this->model(),
                     'template' => $template
                 ]);