diff --git a/Grid/Column/Column.php b/Grid/Column/Column.php
index 3c61a150..9901feb6 100644
--- a/Grid/Column/Column.php
+++ b/Grid/Column/Column.php
@@ -14,7 +14,6 @@
 
 use APY\DataGridBundle\Grid\Filter;
 use APY\DataGridBundle\Grid\Row;
-use Doctrine\Common\Version as DoctrineVersion;
 use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface;
 
 abstract class Column
@@ -213,7 +212,7 @@ public function renderCell($value, $row, $router)
 
         $value = is_bool($value) ? (int) $value : $value;
         if (array_key_exists((string) $value, $this->values)) {
-            $value = $this->values[$value];
+            $value = $this->values[(string) $value];
         }
 
         return $value;
@@ -525,6 +524,10 @@ public function setData($data)
      */
     public function getData()
     {
+        if (!\is_array($this->data)){
+            return [];
+        }
+        
         $result = [];
 
         $hasValue = false;
@@ -685,6 +688,10 @@ public function getFilterType()
 
     public function getFilters($source)
     {
+        if (!\is_array($this->data)) {
+            return [];
+        }
+        
         $filters = [];
 
         if ($this->hasOperator($this->data['operator'])) {
@@ -769,21 +776,6 @@ public function setOperators(array $operators)
      */
     public function getOperators()
     {
-        // Issue with Doctrine
-        // -------------------
-        // @see http://www.doctrine-project.org/jira/browse/DDC-1857
-        // @see http://www.doctrine-project.org/jira/browse/DDC-1858
-        if ($this->hasDQLFunction() && version_compare(DoctrineVersion::VERSION, '2.5') < 0) {
-            return array_intersect($this->operators, [self::OPERATOR_EQ,
-                self::OPERATOR_NEQ,
-                self::OPERATOR_LT,
-                self::OPERATOR_LTE,
-                self::OPERATOR_GT,
-                self::OPERATOR_GTE,
-                self::OPERATOR_BTW,
-                self::OPERATOR_BTWE, ]);
-        }
-
         return $this->operators;
     }