diff --git a/src/classes/entities/class-tainacan-filter.php b/src/classes/entities/class-tainacan-filter.php
index 76ea74548..45e8e2c86 100644
--- a/src/classes/entities/class-tainacan-filter.php
+++ b/src/classes/entities/class-tainacan-filter.php
@@ -82,23 +82,35 @@ class Filter extends Entity {
     }
 
     /**
-     * Retorna o objeto filtro
+     * Retorna o objeto Filter Type
      *
-     * @return Filter
+     * @return array || object
      */
     function get_filter_type_object(){
-    	return unserialize( base64_decode( $this->get_mapped_property('filter_type_object') ) );
+        $class_name = $this->get_filter_type();
+        $object_type = new $class_name();
+        $object_type->set_options(  $this->get_filter_options() );
+        return $object_type;
     }
 
     /**
-     * Retorna o filtro
+     * Retorna o objeto field type
      *
-     * @return string
+     * @return array || object
      */
     function get_filter_type(){
         return $this->get_mapped_property('filter_type');
     }
 
+    /**
+     * Retorna o objeto Metadado
+     *
+     * @return array || object
+     */
+    function get_filter_options(){
+        return $this->get_mapped_property('filter_type_options');
+    }
+
     /**
      * Atribui nome ao filtro
      *
@@ -157,14 +169,14 @@ class Filter extends Entity {
      * @param \Tainacan\Filter_Types\Filter_Type $value
      * @return void
      */
-    function set_filter_type_object( \Tainacan\Filter_Types\Filter_Type $value ){
-        // TODO: validate primitive type with filter
-        //if filter matches the metadata type
-        //if( in_array( $type->get_primitive_type(), $value->get_supported_types() ) ){
-        $this->set_filter_type( get_class( $value ) );
-        $this->set_mapped_property('filter_type_object', base64_encode( serialize($value) ) );
-        //}
-    }
+//    function set_filter_type_object( \Tainacan\Filter_Types\Filter_Type $value ){
+//        // TODO: validate primitive type with filter
+//        //if filter matches the metadata type
+//        //if( in_array( $type->get_primitive_type(), $value->get_supported_types() ) ){
+//        $this->set_filter_type( get_class( $value ) );
+//        $this->set_mapped_property('filter_type_object', base64_encode( serialize($value) ) );
+//        //}
+//    }
 
     /**
      * Atribui o filter type.
@@ -173,7 +185,7 @@ class Filter extends Entity {
      * @param string
      *
      */
-    private function set_filter_type($value){
-        $this->set_mapped_property('filter_type', $value );
+    public function set_filter_type($value){
+        $this->set_mapped_property('filter_type',  get_class( $value ) );
     }
 }
\ No newline at end of file
diff --git a/src/classes/entities/class-tainacan-metadata.php b/src/classes/entities/class-tainacan-metadata.php
index d58da42be..505e760a8 100644
--- a/src/classes/entities/class-tainacan-metadata.php
+++ b/src/classes/entities/class-tainacan-metadata.php
@@ -150,7 +150,10 @@ class Metadata extends Entity {
      * @return array || object
      */
     function get_field_type_object(){
-    	return unserialize(base64_decode( $this->get_mapped_property('field_type_object') ) );
+        $class_name = $this->get_field_type();
+        $object_type = new $class_name();
+        $object_type->set_options(  $this->get_field_options() );
+    	return $object_type;
     }
 
     /**
@@ -159,7 +162,16 @@ class Metadata extends Entity {
      * @return array || object
      */
     function get_field_type(){
-    	return base64_decode($this->get_mapped_property('field_type'));
+    	return $this->get_mapped_property('field_type');
+    }
+
+    /**
+     * Retorna o objeto Metadado
+     *
+     * @return array || object
+     */
+    function get_field_options(){
+        return $this->get_mapped_property('get_field_options');
     }
 
     /**
@@ -272,18 +284,13 @@ class Metadata extends Entity {
         $this->set_mapped_property('default_property', $value);
     }
 
-    function set_field_type_object(\Tainacan\Field_Types\Field_Type $value){
-        $this->set_field_type( get_class( $value )  );
-        $this->set_mapped_property('field_type_object', base64_encode( serialize($value) ) ); // Encode to avoid backslaches removal
-    }
-
     /**
-     * Este metodo é privado, porque é utilizado apenas neste contexto pelo @method set_field_type_object()
+     * save the class  field class name
      *
      * @param $value
      */
-    private function set_field_type($value){
-    	$this->set_mapped_property('field_type',   base64_encode($value) ) ; // Encode to avoid backslaches removal
+    public function set_field_type($value){
+    	$this->set_mapped_property('field_type',   get_class( $value ) ) ; // Encode to avoid backslaches removal
     }
 
     // helpers
diff --git a/src/classes/filter-types/class-tainacan-filter-type.php b/src/classes/filter-types/class-tainacan-filter-type.php
index c00efd9ab..0a1310676 100644
--- a/src/classes/filter-types/class-tainacan-filter-type.php
+++ b/src/classes/filter-types/class-tainacan-filter-type.php
@@ -7,6 +7,7 @@ defined( 'ABSPATH' ) or die( 'No script kiddies please!' );
 abstract class Filter_Type {
 
     private $supported_types = [];
+    public $options;
 
     abstract function render( $metadata );
 
@@ -17,4 +18,11 @@ abstract class Filter_Type {
     public function set_supported_types($supported_types){
         $this->supported_types = $supported_types;
     }
+
+    /**
+     * @param $options
+     */
+    public function set_options( $options ){
+        $this->options = ( is_array( $options ) ) ? $options : unserialize( $options );
+    }
 }
\ No newline at end of file
diff --git a/src/classes/repositories/class-tainacan-filters.php b/src/classes/repositories/class-tainacan-filters.php
index 23063f20e..04e2a735a 100644
--- a/src/classes/repositories/class-tainacan-filters.php
+++ b/src/classes/repositories/class-tainacan-filters.php
@@ -40,11 +40,11 @@ class Filters extends Repository {
                 'description'=> __('The filter description', 'tainacan'),
                 'validation'  => ''
             ],
-            'filter_type_object' => [
+            'filter_type_options' => [
                 'map'        => 'meta',
-                'title'      => __('Type', 'tainacan'),
+                'title'      => __('Filter type options', 'tainacan'),
                 'type'       => 'string',
-                'description'=> __('The filter type object', 'tainacan'),
+                'description'=> __('The filter type options', 'tainacan'),
                 'validation' => ''
             ],
             'filter_type'        => [
diff --git a/src/classes/repositories/class-tainacan-metadatas.php b/src/classes/repositories/class-tainacan-metadatas.php
index 33af396ad..e4d8e3127 100644
--- a/src/classes/repositories/class-tainacan-metadatas.php
+++ b/src/classes/repositories/class-tainacan-metadatas.php
@@ -124,11 +124,11 @@ class Metadatas extends Repository {
                 'type'       => 'string',
                 'description'=> __('The value default fot the metadata', 'tainacan'),
             ],
-            'field_type_object' => [ // not showed in form
+            'field_type_options' => [ // not showed in form
                 'map'        => 'meta',
-                'title'      => __('Type', 'tainacan'),
+                'title'      => __('Field Type options', 'tainacan'),
                 'type'       => 'string',
-                'description'=> __('The object type', 'tainacan'),
+                'description'=> __('Options specific for field type', 'tainacan'),
                // 'validation' => ''
             ],
             'collection_id'  => [ // not showed in form
diff --git a/src/dev-interface/class-tainacan-dev-interface.php b/src/dev-interface/class-tainacan-dev-interface.php
index fc462c87e..bf4980fa6 100644
--- a/src/dev-interface/class-tainacan-dev-interface.php
+++ b/src/dev-interface/class-tainacan-dev-interface.php
@@ -138,10 +138,10 @@ class DevInterface {
                                     <?php $this->collections_dropdown($value); ?>
                                 <?php elseif ($prop == 'collections_ids'): ?>
                                     <?php $this->collections_checkbox_list($value); ?>
-                                <?php elseif ($prop == 'field_type'): ?>
+                                <?php elseif ($prop == 'field_type_options'): ?>
                                     <?php echo $value; ?>
-                                <?php elseif ($prop == 'field_type_object'): ?>
-                                    <?php echo $this->field_type_dropdown($value); ?>
+                                <?php elseif ($prop == 'field_type'): ?>
+                                    <?php echo $this->field_type_dropdown($post->ID,$value); ?>
                                 <?php else: ?>
                                         <textarea name="tnc_prop_<?php echo $prop; ?>"><?php echo htmlspecialchars($value); ?></textarea>
                                 <?php endif; ?>    
@@ -315,11 +315,11 @@ class DevInterface {
         <?php
     }
 
-    function field_type_dropdown($selected) {
+    function field_type_dropdown($id,$selected) {
 
         global $Tainacan_Metadatas;
 
-        $class = ( $selected ) ? unserialize( base64_decode( $selected ) ) : '';
+        $class = ( class_exists( $selected ) ) ? new $selected() : '';
 
         if(is_object( $class )){
             $selected =  str_replace('Tainacan\Field_Types\\','', get_class( $class ) );
@@ -327,13 +327,15 @@ class DevInterface {
 
         $field_types = $Tainacan_Metadatas->fetch_field_types('NAME');
         ?>
-            <select name="tnc_prop_field_type_object">
+            <select name="tnc_prop_field_type">
                 <?php foreach ($field_types as $field_type): ?>
                     <option value="<?php echo $field_type; ?>" <?php selected($field_type, $selected) ?>><?php echo $field_type; ?></option>
                 <?php endforeach; ?>
             </select>
             <?php
              if( $class ){
+                 $options = get_post_meta($id,'field_type_options',true);
+                 $class->set_options($options);
                  echo $class->form();
              }
             ?>
@@ -388,12 +390,12 @@ class DevInterface {
 
                 if ($entity->validate_prop($prop)) {
 
-                    if ($prop == 'field_type_object') {
+                    if ($prop == 'field_type') {
                         $class = '\Tainacan\Field_Types\\'.$value;
-                        $ft = new $class();
-                        $ft->set_options( $_POST['field_type_'.strtolower( $value )] );
-                        update_post_meta($post_id, 'field_type_object',  base64_encode(serialize($ft)) );
-                        update_post_meta($post_id, 'field_type',  base64_encode(get_class( $ft )) );
+                        update_post_meta($post_id, 'field_type_options', $_POST['field_type_'.strtolower( $value ) ] );
+                        update_post_meta($post_id, 'field_type',  wp_slash( get_class( new $class() ) ) );
+                    }else if($prop == 'field_type_options'){
+                        continue;
                     }
                     // we cannot user repository->insert here, it would create an infinite loop
                     else if ($mapped['map'] == 'meta') {
diff --git a/tests/test-filters.php b/tests/test-filters.php
index 126fe43e4..d0ce0a192 100644
--- a/tests/test-filters.php
+++ b/tests/test-filters.php
@@ -58,7 +58,7 @@ class Filters extends TAINACAN_UnitTestCase {
 		    array(
 		    	'name'              => 'metadado',
 			    'collection_id'     => $collection->get_id(),
-			    'field_type_object' => $type
+			    'field_type' => $type
 		    ),
 		    true
 	    );
@@ -71,7 +71,7 @@ class Filters extends TAINACAN_UnitTestCase {
 		    	'name'               => 'filtro',
 			    'collection'         => $collection,
 			    'metadata'           => $metadata,
-			    'filter_type_object' => $filter_list_type
+			    'filter_type' => $filter_list_type
 		    ),
 		    true
 	    );
@@ -79,7 +79,7 @@ class Filters extends TAINACAN_UnitTestCase {
         $filter_range_type = $this->tainacan_filter_factory->create_filter('range');
 
         //nao devera permitir um filtro Range para o tipo string
-        $this->assertTrue( $filter->set_filter_type_object( $filter_range_type ) === null );
+         $this->assertTrue( $filter->set_filter_type( $filter_range_type ) === null );
 
         $test = $Tainacan_Filters->fetch( $filter->get_id() );
 
diff --git a/tests/test-item-metadata.php b/tests/test-item-metadata.php
index fdd4d680b..b8e7f78d9 100644
--- a/tests/test-item-metadata.php
+++ b/tests/test-item-metadata.php
@@ -36,7 +36,7 @@ class Item_Metadata extends TAINACAN_UnitTestCase {
 	        	'name'              => 'metadado',
 		        'description'       => 'descricao',
 		        'collection'        => $collection,
-		        'field_type_object' => $type
+		        'field_type' => $type
 	        ),
 	        true
         );
@@ -88,7 +88,7 @@ class Item_Metadata extends TAINACAN_UnitTestCase {
 			    'description'       => 'descricao',
 			    'collection'        => $collection,
 			    'required'          => 'yes',
-			    'field_type_object' => $type
+			    'field_type' => $type
 		    ),
 		    true
 	    );
@@ -142,7 +142,7 @@ class Item_Metadata extends TAINACAN_UnitTestCase {
 			    'description'       => 'descricao',
 			    'collection'        => $collection,
 			    'collection_key'    => 'yes',
-			    'field_type_object' => $type
+			    'field_type' => $type
 		    ),
 		    true
 	    );
@@ -200,7 +200,7 @@ class Item_Metadata extends TAINACAN_UnitTestCase {
 	            'description'       => 'descricao',
 	            'collection'        => $collection,
 	            'status'            => 'publish',
-	            'field_type_object' => $type
+	            'field_type' => $type
             ),
 	        true
         );
diff --git a/tests/test-items.php b/tests/test-items.php
index 297d97146..2c6f11e8a 100644
--- a/tests/test-items.php
+++ b/tests/test-items.php
@@ -43,7 +43,7 @@ class Items extends TAINACAN_UnitTestCase {
 			    'name'   => 'metadado',
 			    'status' => 'publish',
 			    'collection' => $collection,
-			    'field_type_object' => $type
+			    'field_type' => $type
 		    ),
 		    true
 	    );
@@ -54,7 +54,7 @@ class Items extends TAINACAN_UnitTestCase {
 			    'name'   => 'metadado2',
 			    'status' => 'publish',
 			    'collection' => $collection,
-			    'field_type_object' => $type
+			    'field_type' => $type
 		    ),
 		    true
 	    );
@@ -65,7 +65,7 @@ class Items extends TAINACAN_UnitTestCase {
 			    'name'              => 'metadado3',
 			    'status'            => 'publish',
 			    'collection'        => $collection,
-			    'field_type_object' => $type
+			    'field_type' => $type
 		    ),
 		    true
 	    );
diff --git a/tests/test-metadata.php b/tests/test-metadata.php
index 826767f2e..2331287a7 100644
--- a/tests/test-metadata.php
+++ b/tests/test-metadata.php
@@ -35,7 +35,7 @@ class Metadata extends TAINACAN_UnitTestCase {
 	        	'name' => 'metadado',
 		        'description' => 'descricao',
 		        'collection' => $collection,
-		        'field_type_object' => $type
+		        'field_type' => $type
 	        ),
 	        true
         );
@@ -69,7 +69,7 @@ class Metadata extends TAINACAN_UnitTestCase {
 		        'name'              => 'metadado',
 		        'description'       => 'descricao',
 		        'collection_id'     => $collection->get_id(),
-		        'field_type_object' => $type
+		        'field_type' => $type
 	        ),
 	        true
         );
@@ -95,7 +95,7 @@ class Metadata extends TAINACAN_UnitTestCase {
 	        array(
 	        	'name'              => 'metadata default',
 		        'collection_id'     => $Tainacan_Metadatas->get_default_metadata_attribute(),
-		        'field_type_object' => $type,
+		        'field_type' => $type,
 		        'status'            => 'publish'
 	        ),
 	        true
@@ -114,7 +114,7 @@ class Metadata extends TAINACAN_UnitTestCase {
 	        array(
 	        	'name'              => 'metadata grandfather',
 		        'collection_id'     => $collection_grandfather->get_id(),
-		        'field_type_object' => $type,
+		        'field_type' => $type,
 		        'status'            => 'publish'
 	        ),
 	        true
@@ -134,7 +134,7 @@ class Metadata extends TAINACAN_UnitTestCase {
 		    array(
 			    'name'              => 'metadata father',
 			    'collection_id'     => $collection_father->get_id(),
-			    'field_type_object' => $type,
+			    'field_type' => $type,
 			    'status'            => 'publish'
 		    ),
 		    true
@@ -157,7 +157,7 @@ class Metadata extends TAINACAN_UnitTestCase {
 		    array(
 			    'name'              => 'metadata son',
 			    'collection_id'     => $collection_son->get_id(),
-			    'field_type_object' => $type,
+			    'field_type' => $type,
 			    'status'            => 'publish'
 		    ),
 		    true