When creating a resource, set the context model prior to field validation

Otherwise it is impossible for the fields to know what kind of model is being created

Author: tobyzerner

CHANGELOG.md

@@ -8,6 +8,10 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Fixed
+
+-   When creating a resource, set the context model prior to field validation
+
 ## [1.0.0-beta.1] - 2023-09-24
 
 ### Added

src/Endpoint/Create.php

@@ -51,13 +51,12 @@ public function handle(Context $context): ?ResponseInterface
 
         $data = $this->parseData($context);
 
+        $context = $context->withModel($model = $resource->newModel($context));
+
         $this->assertFieldsValid($context, $data);
         $this->fillDefaultValues($context, $data);
         $this->deserializeValues($context, $data);
         $this->assertDataValid($context, $data, true);
-
-        $context = $context->withModel($model = $resource->newModel($context));
-
         $this->setValues($context, $data);
 
         $context = $context->withModel($model = $resource->create($model, $context));