symfony · javiereguiluz · Feb 15, 2022 · Feb 13, 2022
diff --git a/form/create_form_type_extension.rst b/form/create_form_type_extension.rst
@@ -192,7 +192,7 @@ Specifically, you need to override the ``file_widget`` block:

    {% block file_widget %}
        {{ block('form_widget') }}
-        {% if image_url is not null %}
+        {% if image_url is defined and image_url is not null %}
            <img src="{{ asset(image_url) }}"/>
        {% endif %}
    {% endblock %}