Test if document exists

roadiz · Feb 11, 2015 · d94eeae · d94eeae
1 parent cfb8296
commit d94eeae
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/themes/using_twig.rst b/themes/using_twig.rst
@@ -178,13 +178,19 @@ Now, you can use ``DocumentViewer`` to generate HTML view for your documents no
 
 .. code-block:: html+jinja
 
+    {# Grab only first document from “images” field #}
+    {% set image = nodeSource.images[0] %}
+
+    {# Always test if document exists #}
+    {% if image %}
     {{ image.viewer.documentByArray({
         'width':200,
         'height':200,
         'crop':"1:1",
         'quality':75,
         'embed':true
     })|raw }}
+    {% endif %}
 
 HTML output options
 ^^^^^^^^^^^^^^^^^^^