2 files changed, 30 insertions, 1 deletions

diff --git a/src/Wallabag/CoreBundle/Form/Type/EntryFilterType.php b/src/Wallabag/CoreBundle/Form/Type/EntryFilterType.php
index ee66c728..556578d1 100644
--- a/src/Wallabag/CoreBundle/Form/Type/EntryFilterType.php
+++ b/src/Wallabag/CoreBundle/Form/Type/EntryFilterType.php
@@ -3,6 +3,7 @@
 namespace Wallabag\CoreBundle\Form\Type;
 
 use Doctrine\ORM\EntityRepository;
+use Lexik\Bundle\FormFilterBundle\Filter\FilterOperands;
 use Lexik\Bundle\FormFilterBundle\Filter\Query\QueryInterface;
 use Lexik\Bundle\FormFilterBundle\Filter\Form\Type\NumberRangeFilterType;
 use Lexik\Bundle\FormFilterBundle\Filter\Form\Type\DateRangeFilterType;
@@ -33,7 +34,7 @@ class EntryFilterType extends AbstractType
         $this->user = $tokenStorage->getToken() ? $tokenStorage->getToken()->getUser() : null;
 
         if (null === $this->user || !is_object($this->user)) {
-            return null;
+            return;
         }
     }
 
@@ -41,6 +42,14 @@ class EntryFilterType extends AbstractType
     {
         $builder
             ->add('readingTime', NumberRangeFilterType::class, [
+                'left_number_options' => [
+                    'condition_operator' => FilterOperands::OPERATOR_GREATER_THAN_EQUAL,
+                    'attr' => ['min' => 0],
+                ],
+                'right_number_options' => [
+                    'condition_operator' => FilterOperands::OPERATOR_LOWER_THAN_EQUAL,
+                    'attr' => ['min' => 0],
+                ],
                 'apply_filter' => function (QueryInterface $filterQuery, $field, $values) {
                     $lower = $values['value']['left_number'][0];
                     $upper = $values['value']['right_number'][0];
diff --git a/tests/Wallabag/CoreBundle/Controller/EntryControllerTest.php b/tests/Wallabag/CoreBundle/Controller/EntryControllerTest.php
index 3eb6d47f..7db4cf1f 100644
--- a/tests/Wallabag/CoreBundle/Controller/EntryControllerTest.php
+++ b/tests/Wallabag/CoreBundle/Controller/EntryControllerTest.php
@@ -591,6 +591,26 @@ class EntryControllerTest extends WallabagCoreTestCase
         $this->assertCount(1, $crawler->filter('div[class=entry]'));
     }
 
+    public function testFilterOnReadingTimeWithNegativeValue()
+    {
+        $this->logInAs('admin');
+        $client = $this->getClient();
+
+        $crawler = $client->request('GET', '/unread/list');
+
+        $form = $crawler->filter('button[id=submit-filter]')->form();
+
+        $data = [
+            'entry_filter[readingTime][right_number]' => -22,
+            'entry_filter[readingTime][left_number]' => -22,
+        ];
+
+        $crawler = $client->submit($form, $data);
+
+        // forcing negative value results in no entry displayed
+        $this->assertCount(0, $crawler->filter('div[class=entry]'));
+    }
+
     public function testFilterOnReadingTimeOnlyUpper()
     {
         $this->logInAs('admin');