improve doc storing

Entity/Document.php

@@ -49,6 +49,9 @@ class Document implements HasScopeInterface
      *  cascade={"persist"}
      * )
      * @Assert\Valid()
+     * @Assert\NotNull(
+     *  message="Upload a document"
+     * )
      */
     private $object;
 
@@ -113,18 +116,6 @@ class Document implements HasScopeInterface
         return $this;
     }
 
-    public function getContent(): ?string
-    {
-        return $this->content;
-    }
-
-    public function setContent(string $content): self
-    {
-        $this->content = $content;
-
-        return $this;
-    }
-
     /**
      * Get scope
      *