More robust template tags

app/templatetags/settings.py

@@ -9,7 +9,12 @@ logger = logging.getLogger('app.logger')
 
 @register.simple_tag(takes_context=True)
 def settings_image_url(context, image):
-    img_cache = getattr(context['SETTINGS'], image)
+    try:
+        img_cache = getattr(context['SETTINGS'], image)
+    except KeyError:
+        logger.warning("Cannot get SETTINGS key from context. Something's wrong in settings_image_url.")
+        return ''
+
     try:
         return "/media/" + img_cache.url
     except FileNotFoundError:
@@ -18,7 +23,12 @@ def settings_image_url(context, image):
 
 @register.simple_tag(takes_context=True)
 def get_footer(context):
-    settings = context['SETTINGS']
+    try:
+        settings = context['SETTINGS']
+    except KeyError:
+        logger.warning("Cannot get SETTINGS key from context. The footer will not be displayed.")
+        return ""
+
     if settings.theme.html_footer == "": return ""
 
     organization = ""