Add demo for scalar datasources

Author: daniel-werner

app/DocumentTemplates/InvoiceTemplate.php

@@ -17,7 +17,9 @@ protected function dataSources()
         return [
             $this->dataSource($this->testOrders[0], 'order', true, 'orders'),
             $this->dataSource(new User(), 'user'),
+            $this->dataSource('', 'text'),
+            $this->dataSource(null, 'number'),
         ];
     }
 
-}
+}

app/Http/Controllers/DemoDocumentTemplatesController.php

@@ -37,7 +37,9 @@ protected function getTemplateData()
             'user' => Auth::user(),
             'orders' => $this->getTestOrders(),
             'foods' => $this->getFood(),
-            'dates' => $this->getDates()
+            'dates' => $this->getDates(),
+            'text'  => 'coders',
+            'number' => 42
         ];
     }