diff --git a/src/classes/entities/class-tainacan-metadata.php b/src/classes/entities/class-tainacan-metadata.php
index 1c48eda6c..318a2e608 100644
--- a/src/classes/entities/class-tainacan-metadata.php
+++ b/src/classes/entities/class-tainacan-metadata.php
@@ -8,10 +8,10 @@ defined( 'ABSPATH' ) or die( 'No script kiddies please!' );
  * Representa a entidade Metadata e extende a super classe Entity
  */
 class Metadata extends Entity {
-    const POST_TYPE = 'tainacan-metadata';    
-
 	use \Tainacan\Traits\Entity_Collection_Relation;
-    
+
+	protected static $post_type = 'tainacan-metadata';
+	
     function __construct( $which = 0 ) {
 
         $this->repository = 'Tainacan_Metadatas';
diff --git a/src/classes/repositories/class-tainacan-metadatas.php b/src/classes/repositories/class-tainacan-metadatas.php
index 0fd8db74a..5b0fa0bb4 100644
--- a/src/classes/repositories/class-tainacan-metadatas.php
+++ b/src/classes/repositories/class-tainacan-metadatas.php
@@ -9,7 +9,8 @@ defined( 'ABSPATH' ) or die( 'No script kiddies please!' );
  * Class Metadatas
  */
 class Metadatas extends Repository {
-
+	protected $entities_type = '\Tainacan\Entities\Metadata';
+	
     public function get_map() {
         return [
             'id'             => [
@@ -113,13 +114,13 @@ class Metadatas extends Repository {
             'rewrite'             => true,
             'capability_type'     => 'post',
         );
-        register_post_type(Entities\Metadata::POST_TYPE, $args);
+        register_post_type(Entities\Metadata::get_post_type(), $args);
     }
 
     /**
      * @param Entities\Metadata $metadata
      * @return int
-     */
+     *
     public function insert($metadata) {
         // First iterate through the native post properties
         $map = $this->get_map();
@@ -155,7 +156,7 @@ class Metadatas extends Repository {
         
         // return a brand new object
         return new Entities\Metadata($metadata->WP_Post);
-    }
+    }*/
 
     public function fetch($object, $args = []){
         // TODO: get metadata from parent collections
@@ -165,7 +166,7 @@ class Metadatas extends Repository {
             $collection_id = ( is_object( $object ) ) ? $object->get_id() : $object;
 
             $args = array_merge([
-                'post_type'      => Entities\Metadata::POST_TYPE,
+                'post_type'      => Entities\Metadata::get_post_type(),
                 'posts_per_page' => -1,
                 'post_status'    => 'publish',
                 'meta_key'       => 'collection_id',