Image and File fields support twig is empty test

src/Entity/Content.php

@@ -9,6 +9,7 @@
 use ApiPlatform\Core\Annotation\ApiSubresource;
 use ApiPlatform\Core\Bridge\Doctrine\Orm\Filter\SearchFilter;
 use Bolt\Configuration\Content\ContentType;
+use Bolt\Entity\Field\Excerptable;
 use Bolt\Enum\Statuses;
 use Bolt\Repository\FieldRepository;
 use Doctrine\Common\Collections\ArrayCollection;
@@ -639,7 +640,11 @@ public function __call(string $name, array $arguments = [])
             throw new \RuntimeException(sprintf('Invalid field name or method call on %s: %s', $this->__toString(), $name));
         }
 
-        return $field->getTwigValue();
+        if ($field instanceof Excerptable) {
+            return $field->getTwigValue();
+        }
+
+        return $field;
     }
 
     /**

src/Entity/Field/FileField.php

@@ -6,12 +6,13 @@
 
 use Bolt\Entity\Field;
 use Bolt\Entity\FieldInterface;
+use Countable;
 use Doctrine\ORM\Mapping as ORM;
 
 /**
  * @ORM\Entity
  */
-class FileField extends Field implements FieldInterface
+class FileField extends Field implements FieldInterface, Countable
 {
     use FileExtrasTrait;
 
@@ -52,4 +53,13 @@ public function getValue(): array
 
         return $value;
     }
+
+    /**
+     * Allows {% if image is empty %} in Twig
+     * See https://twig.symfony.com/doc/3.x/tests/empty.html
+     */
+    public function count()
+    {
+        return empty($this->getValue()['filename']);
+    }
 }

src/Entity/Field/ImageField.php

@@ -9,14 +9,15 @@
 use Bolt\Entity\Media;
 use Bolt\Repository\MediaRepository;
 use Bolt\Utils\ThumbnailHelper;
+use Countable;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Asset\PathPackage;
 use Symfony\Component\Asset\VersionStrategy\EmptyVersionStrategy;
 
 /**
  * @ORM\Entity
  */
-class ImageField extends Field implements FieldInterface, MediaAwareInterface
+class ImageField extends Field implements FieldInterface, MediaAwareInterface, Countable
 {
     use FileExtrasTrait;
 
@@ -99,4 +100,13 @@ public function includeAlt(): bool
 
         return $this->getDefinition()->get('alt') === true;
     }
+
+    /**
+     * Allows {% if file is empty %} in Twig
+     * See https://twig.symfony.com/doc/3.x/tests/empty.html
+     */
+    public function count()
+    {
+        return empty($this->getValue()['filename']);
+    }
 }