Merge pull request #21 from oanhnn/patch-1

Add support NullResource

src/Fractal.php

@@ -64,7 +64,7 @@ public static function create($data = null, $transformer = null, $serializer = n
         $instance = new static(new Manager());
 
         $instance->data = $data ?: null;
-        $instance->dataType = $data ? $instance->determineDataType($data) : null;
+        $instance->dataType = $instance->determineDataType($data);
         $instance->transformer = $transformer ?: null;
         $instance->serializer = $serializer ?: null;
 
@@ -138,6 +138,10 @@ public function data($dataType, $data, $transformer = null)
      */
     protected function determineDataType($data)
     {
+        if (is_null($data)) {
+            return 'NullResource';
+        }
+
         if (is_array($data)) {
             return 'collection';
         }

tests/FractalTest.php

@@ -3,7 +3,9 @@
 namespace Spatie\Fractalistic\Test;
 
 use League\Fractal\Pagination\Cursor;
+use League\Fractal\Serializer\JsonApiSerializer;
 use Spatie\Fractalistic\ArraySerializer;
+use Spatie\Fractalistic\Fractal;
 
 class FractalTest extends TestCase
 {
@@ -115,6 +117,41 @@ public function it_can_create_fractal_data()
         $this->assertInstanceOf(\League\Fractal\Scope::class, $resource);
     }
 
+    /** @test */
+    public function it_can_perform_a_null_item()
+    {
+        $array = Fractal::create(null, NullableTransformer::class)
+            ->serializeWith(new JsonApiSerializer())
+            ->withResourceName('books')
+            ->toArray();
+
+        $expectedArray = ['data' => null];
+
+        $this->assertEquals($expectedArray, $array);
+    }
+
+    /** @test */
+    public function it_can_create_a_null_resource()
+    {
+        $resource = Fractal::create(null, NullableTransformer::class)
+            ->serializeWith(new JsonApiSerializer())
+            ->withResourceName('books')
+            ->getResource();
+
+        $this->assertInstanceOf(\League\Fractal\Resource\ResourceInterface::class, $resource);
+    }
+
+    /** @test */
+    public function it_can_create_nul_fractal_data()
+    {
+        $resource = Fractal::create(null, NullableTransformer::class)
+            ->serializeWith(new JsonApiSerializer())
+            ->withResourceName('books')
+            ->createData();
+
+        $this->assertInstanceOf(\League\Fractal\Scope::class, $resource);
+    }
+
     /** @test */
     public function it_provides_chainable_methods()
     {

tests/NullableTransformer.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Spatie\Fractalistic\Test;
+
+class NullableTransformer extends TestTransformer
+{
+    /**
+     * @param array $book
+     *
+     * @return array
+     */
+    public function transform(array $book = null)
+    {
+        return is_null($book) ? [] : parent::transform($book);
+    }
+}