Add singular types support (#15)

* add singular types support * fix missed Inflector

Author: kfreiman

src/ResourceTrait.php

@@ -28,7 +28,7 @@ public function getType()
  {
  $reflect = new \ReflectionClass($this);
  $className = $reflect->getShortName();
- return Inflector::pluralize(Inflector::camel2id($className));
+ return Inflector::camel2id($className);
  }
 
  /**

src/Serializer.php

@@ -14,6 +14,7 @@
 use yii\web\Linkable;
 use yii\web\Request;
 use yii\web\Response;
+use yii\helpers\Inflector;
 
 class Serializer extends Component
 {
@@ -48,7 +49,10 @@ class Serializer extends Component
  * @var Response the response to be sent. If not set, the `response` application component will be used.
  */
  public $response;
-
+ /**
+ * @var bool whether to automatically pluralize the `type` of resource.
+ */
+ public $pluralize = true;
 
  /**
  * @inheritdoc
@@ -113,7 +117,7 @@ protected function serializeModel(ResourceInterface $model)
 
  if (!empty($relationship)) {
  if (in_array($name, $included)) {
- $data['relationships'][$name]['data'] = $relationship; 
+ $data['relationships'][$name]['data'] = $relationship;
  }
  }
  if ($model instanceof LinksInterface) {
@@ -167,6 +171,9 @@ protected function serializeIdentifier(ResourceIdentifierInterface $identifier)
  if ($value === null || is_array($value) || (is_object($value) && !method_exists($value, '__toString'))) {
  throw new InvalidValueException("The value {$key} of resource object " . get_class($identifier) . ' MUST be a string.');
  }
+ if ($key === 'type' && $this->pluralize) {
+ $value = Inflector::pluralize($value);
+ }
  $result[$key] = (string) $value;
  }
  return $result;