diff --git a/Bundle/BlogBundle/Filter/CategoryFilter.php b/Bundle/BlogBundle/Filter/CategoryFilter.php
index 85d3dd0bc..e1619dca4 100644
--- a/Bundle/BlogBundle/Filter/CategoryFilter.php
+++ b/Bundle/BlogBundle/Filter/CategoryFilter.php
@@ -9,23 +9,34 @@
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\Translation\TranslatorInterface;
 use Victoire\Bundle\BlogBundle\Entity\Category;
+use Victoire\Bundle\FilterBundle\Domain\FilterFormFieldQueryHandler;
 use Victoire\Bundle\FilterBundle\Filter\BaseFilter;
 
 /**
- * CategoryFilter form type.
+ * Class CategoryFilter.
  */
 class CategoryFilter extends BaseFilter
 {
+    /**
+     * @var TranslatorInterface
+     */
     protected $translator;
 
     /**
-     * @param EntityManager       $entityManager
-     * @param RequestStack        $requestStack
-     * @param TranslatorInterface $translator
+     * CategoryFilter constructor.
+     *
+     * @param EntityManager               $entityManager
+     * @param RequestStack                $requestStack
+     * @param FilterFormFieldQueryHandler $filterQueryHandler
+     * @param TranslatorInterface         $translator
      */
-    public function __construct(EntityManager $entityManager, RequestStack $requestStack, TranslatorInterface $translator)
-    {
-        parent::__construct($entityManager, $requestStack);
+    public function __construct(
+        EntityManager $entityManager,
+        RequestStack $requestStack,
+        FilterFormFieldQueryHandler $filterQueryHandler,
+        TranslatorInterface $translator
+    ) {
+        parent::__construct($entityManager, $requestStack, $filterQueryHandler);
         $this->translator = $translator;
     }
 
@@ -98,26 +109,8 @@ public function getCategoryChildrens(Category $category, $childrenArray)
      */
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
+        $categories = $this->filterQueryHandler->handle($options['widget'], BlogCategory::class);
 
-        //getAll categories
-        $categoryQb = $this->getEntityManager()->getRepository('VictoireBlogBundle:Category')->getAll();
-        //getAll published articles
-        $articleQb = $this->getEntityManager()->getRepository('VictoireBlogBundle:Article')->getAll(true);
-
-        //get Listing
-        $listing = $options['widget']->getListing();
-
-        $mode = $listing->getMode();
-        switch ($mode) {
-            case 'query':
-                //filter with listingQuery
-                $articleQb->filterWithListingQuery($listing->getQuery());
-                break;
-        }
-        $categoryQb->filterByArticles($articleQb->getInstance('article'));
-        $categories = $categoryQb->getInstance('c_category')->getQuery()->getResult();
-
-        //the blank value
         $categoriesChoices = [];
 
         foreach ($categories as $category) {
@@ -135,6 +128,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
                 $data = $this->getRequest()->query->get('filter')['category_filter']['category'];
             }
         }
+
         $builder
             ->add(
                 'category', ChoiceType::class, [
diff --git a/Bundle/BlogBundle/Filter/TagFilter.php b/Bundle/BlogBundle/Filter/TagFilter.php
index be2bbb9ea..e8ad4ce14 100644
--- a/Bundle/BlogBundle/Filter/TagFilter.php
+++ b/Bundle/BlogBundle/Filter/TagFilter.php
@@ -5,6 +5,7 @@
 use Doctrine\ORM\QueryBuilder;
 use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
 use Symfony\Component\Form\FormBuilderInterface;
+use Victoire\Bundle\BlogBundle\Entity\Tag;
 use Victoire\Bundle\FilterBundle\Filter\BaseFilter;
 
 /**
@@ -68,25 +69,7 @@ public function buildQuery(QueryBuilder $qb, array $parameters)
      */
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
-        //getAll tags
-        $tagQb = $this->getEntityManager()->getRepository('VictoireBlogBundle:Tag')->getAll();
-        //getAll published articles
-        $articleQb = $this->getEntityManager()->getRepository('VictoireBlogBundle:Article')->getAll(true);
-
-        //get Listing
-        $listing = $options['widget']->getListing();
-
-        $mode = $listing->getMode();
-        switch ($mode) {
-            case 'query':                //filter with listingQuery
-                $articleQb->filterWithListingQuery($listing->getQuery());
-                break;
-        }
-        //filter tags with right articles
-        $tagQb->filterByArticles($articleQb->getInstance('article'));
-        $tags = $tagQb->getInstance('t_tag')->getQuery()->getResult();
-        //the blank value
-        $tagsChoices = [];
+        $tags = $this->filterQueryHandler->handle($options['widget'], Tag::class);
 
         foreach ($tags as $tag) {
             $tagsChoices[$tag->getTitle()] = $tag->getId();
diff --git a/Bundle/BlogBundle/Resources/config/services.yml b/Bundle/BlogBundle/Resources/config/services.yml
index c4ffc0332..4059867cf 100644
--- a/Bundle/BlogBundle/Resources/config/services.yml
+++ b/Bundle/BlogBundle/Resources/config/services.yml
@@ -120,10 +120,9 @@ services:
 
     #CATEGORY FILTER
     victoire_blog.category_filters.form.type:
-        class: "%victoire_blog_category_filters_form_type_class%"
+        class: %victoire_blog_category_filters_form_type_class%
+        parent: victoire_filter_bundle.abstract_base_filter
         arguments:
-            - "@doctrine.orm.entity_manager"
-            - "@request_stack"
             - "@translator"
         tags:
             - { name: form.type }
@@ -131,20 +130,16 @@ services:
 
     #TAG FILTER
     victoire_blog.tag_filters.form.type:
-        class: "%victoire_blog_tag_filters_form_type_class%"
-        arguments:
-            - "@doctrine.orm.entity_manager"
-            - "@request_stack"
+        class: %victoire_blog_tag_filters_form_type_class%
+        parent: victoire_filter_bundle.abstract_base_filter
         tags:
             - { name: form.type }
             - { name: victoire_core.filter }
 
     #DATE FILTER
     victoire_blog.date_filters.form.type:
-        class: "%victoire_blog_date_filters_form_type_class%"
-        arguments:
-            - "@doctrine.orm.entity_manager"
-            - "@request_stack"
+        class: %victoire_blog_date_filters_form_type_class%
+        parent: victoire_filter_bundle.abstract_base_filter
         tags:
             - { name: form.type }
             - { name: victoire_core.filter }
diff --git a/Bundle/FilterBundle/Domain/FilterFormFieldQueryHandler.php b/Bundle/FilterBundle/Domain/FilterFormFieldQueryHandler.php
new file mode 100644
index 000000000..137500551
--- /dev/null
+++ b/Bundle/FilterBundle/Domain/FilterFormFieldQueryHandler.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace Victoire\Bundle\FilterBundle\Domain;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\ORM\EntityManager;
+use Victoire\Bundle\QueryBundle\Helper\QueryHelper;
+use Victoire\Bundle\WidgetBundle\Entity\Widget;
+
+/**
+ * Class FilterFormFieldQueryHandler.
+ */
+class FilterFormFieldQueryHandler
+{
+    /**
+     * @var QueryHelper
+     */
+    private $queryHelper;
+    /**
+     * @var EntityManager
+     */
+    private $entityManager;
+
+    /**
+     * FilterFormFieldQueryHandler constructor.
+     *
+     * @param QueryHelper   $queryHelper
+     * @param EntityManager $entityManager
+     */
+    public function __construct(
+        QueryHelper $queryHelper,
+        EntityManager $entityManager
+    ) {
+        $this->queryHelper = $queryHelper;
+        $this->entityManager = $entityManager;
+    }
+
+    /**
+     * @param Widget $widgetFilter
+     * @param $entity
+     *
+     * @return array
+     */
+    public function handle(Widget $widgetFilter, $entity)
+    {
+        $widgetListing = $widgetFilter->getListing();
+
+        /* first we generate the query for the listing widget */
+        $queryBuilder = $this->queryHelper->getQueryBuilder($widgetListing, $this->entityManager);
+
+        $mode = $widgetListing->getMode();
+
+        if ($mode == 'query') {
+            /* if listing widget is in query mode we had a subquery with here parameter */
+            $queryBuilder = $this->queryHelper->buildWithSubQuery($widgetListing, $queryBuilder, $this->entityManager);
+        }
+
+        $subQuery = $queryBuilder->getQuery();
+        $subQueryParameters = $queryBuilder->getParameters();
+
+        $filterEntityRepo = $this->entityManager->getRepository($entity);
+
+        $alias = explode('\\', $entity);
+        $alias = end($alias);
+
+        /* we build a new query for the filter entity */
+        $queryBuilder = $filterEntityRepo->createQueryBuilder($alias);
+        /* and give the query for the listing entity has subquery */
+        $queryBuilder->andWhere($queryBuilder->expr()->in($alias, $subQuery->getDQL()));
+
+        $parameters = new ArrayCollection(
+            array_merge($subQueryParameters->toArray(), $queryBuilder->getParameters()->toArray())
+        );
+        $queryBuilder->setParameters($parameters);
+
+        $entities = $queryBuilder->getQuery()->getResult();
+
+        return $entities;
+    }
+}
diff --git a/Bundle/FilterBundle/Filter/BaseFilter.php b/Bundle/FilterBundle/Filter/BaseFilter.php
index cf8785b38..2d9faecba 100644
--- a/Bundle/FilterBundle/Filter/BaseFilter.php
+++ b/Bundle/FilterBundle/Filter/BaseFilter.php
@@ -8,25 +8,49 @@
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\OptionsResolver\OptionsResolver;
+use Victoire\Bundle\FilterBundle\Domain\FilterFormFieldQueryHandler;
 
+/**
+ * Class BaseFilter.
+ */
 abstract class BaseFilter extends AbstractType implements BaseFilterInterface
 {
+    /**
+     * @var EntityManager
+     */
     protected $entityManager;
     /**
      * @var RequestStack
      */
-    private $requestStack;
+    protected $requestStack;
+    /**
+     * @var FilterFormFieldQueryHandler
+     */
+    protected $filterQueryHandler;
 
     /**
-     * @param EntityManager $em
-     * @param RequestStack  $requestStack
+     * BaseFilter constructor.
+     *
+     * @param EntityManager               $entityManager
+     * @param RequestStack                $requestStack
+     * @param FilterFormFieldQueryHandler $filterQueryHandler
      */
-    public function __construct(EntityManager $em, RequestStack $requestStack)
-    {
-        $this->entityManager = $em;
+    public function __construct(
+        EntityManager $entityManager,
+        RequestStack $requestStack,
+        FilterFormFieldQueryHandler $filterQueryHandler
+    ) {
+        $this->entityManager = $entityManager;
         $this->requestStack = $requestStack;
+        $this->filterQueryHandler = $filterQueryHandler;
     }
 
+    /**
+     * @param QueryBuilder $qb
+     * @param array        $parameters
+     *
+     * @return mixed
+     */
     abstract public function buildQuery(QueryBuilder $qb, array $parameters);
 
     /**
diff --git a/Bundle/FilterBundle/README.md b/Bundle/FilterBundle/README.md
index 6b2d41837..0c5294924 100644
--- a/Bundle/FilterBundle/README.md
+++ b/Bundle/FilterBundle/README.md
@@ -1,3 +1,45 @@
 Allows to filter any list's results
 
-**MORE DETAILS SOON**
+To create a new filter you have to build a Filter class extending the abstract Victoire\FilterBundle\Filter\BaseFilter class 
+
+```php
+    <?php
+    
+        namespace AppBundle\Filter;
+        
+        use Victoire\FilterBundle\Filter\BaseFilter;
+        
+        class TagFilter extends BaseFilter {
+            
+            /* will be the entry point to generate the result query of a filter */
+            public function buildQuery(){}
+            
+            /* BaseFilter is an extension of symfony AbstractType so you can generate a form as usual */
+            public function buildForm(){}
+            
+            /* Mandatory since when a filter is apply the WidgetListingContentResolver will identify the good filter with this method */
+            public function getName(){}
+            
+            /* Method used in the WidgetListingContentResolver to recover the selected entity */
+            public function getFilters(){}
+        }
+```
+        
+And you have to declare it in your services
+
+```yaml
+        victoire_blog.tag_filters.form.type:
+            class: AppBundle\Filter\TagFilter
+            parent: victoire_filter_bundle.abstract_base_filter
+            tags:
+                - { name: form.type }
+                - { name: victoire_core.filter } 
+```         
+
+If your list has been created in query mode you can use the FilterFormFieldQueryHandler service 
+wich is accessible in the Base Filter to build your query.
+
+```php
+    /* he takes the WidgetFilter and the class name of the filtred entity and return an array of that entities */
+    $this->filterQueryHandler->handle($options['widget'], Tag::class);
+```
\ No newline at end of file
diff --git a/Bundle/FilterBundle/Resources/config/services.yml b/Bundle/FilterBundle/Resources/config/services.yml
index b106d0515..32c9fb876 100644
--- a/Bundle/FilterBundle/Resources/config/services.yml
+++ b/Bundle/FilterBundle/Resources/config/services.yml
@@ -1,3 +1,21 @@
 services:
     victoire_core.filter_chain:
         class: Victoire\Bundle\FilterBundle\Filter\Chain\FilterChain
+
+    #############################
+    ######## DOMAIN
+    ############################
+
+    victoire_filter_bundle.abstract_base_filter:
+        class: Victoire\Bundle\FilterBundle\Filter\BaseFilter
+        abstract: true
+        arguments:
+            - "@doctrine.orm.entity_manager"
+            - "@request_stack"
+            - "@victoire_filter_bundle.filter_form_field_query.handler"
+
+    victoire_filter_bundle.filter_form_field_query.handler:
+        class: Victoire\Bundle\FilterBundle\Domain\FilterFormFieldQueryHandler
+        arguments:
+            - "@victoire_query.query_helper"
+            - "@doctrine.orm.entity_manager"