allow for handling the pathological case of an insanely large template context

3 files changed, 21 insertions, 13 deletions

diff --git a/README.rst b/README.rst
index 60aa8d0..79b224a 100644
--- a/README.rst
+++ b/README.rst
@@ -104,6 +104,11 @@ The debug toolbar has two settings that can be set in `settings.py`:
    * `HIDE_DJANGO_SQL`: If set to True (the default) then code in Django itself
      won't be show in SQL stacktraces.
 
+   * `SHOW_TEMPLATE_CONTEXT`: If set to True (the default) then a template's
+     context will be included with it in the Template debug panel.  Turning this
+     off is useful when you have large template contexts, or you have template
+     contexts with lazy datastructures that you don't want to be evaluated.
+
    Example configuration::
 
 	def custom_show_toolbar(request):
diff --git a/debug_toolbar/panels/template.py b/debug_toolbar/panels/template.py
index ad6dd04..e99b9c5 100644
--- a/debug_toolbar/panels/template.py
+++ b/debug_toolbar/panels/template.py
@@ -73,15 +73,16 @@ class TemplateDebugPanel(DebugPanel):
                 t.origin_name = 'No origin'
             info['template'] = t
             # Clean up context for better readability
-            c = d.get('context', None)
-            
-            d_list = []
-            for _d in c.dicts:
-                try:
-                    d_list.append(pformat(d))
-                except UnicodeEncodeError:
-                    pass
-            info['context'] = '\n'.join(d_list)
+            if getattr(settings, 'DEBUG_TOOLBAR_CONFIG', {}).get('SHOW_TEMPLATE_CONTEXT', True):
+                c = d.get('context', None)
+
+                d_list = []
+                for _d in c.dicts:
+                    try:
+                        d_list.append(pformat(d))
+                    except UnicodeEncodeError:
+                        pass
+                info['context'] = '\n'.join(d_list)
             template_context.append(info)
         context = {
             'templates': template_context,
diff --git a/debug_toolbar/templates/debug_toolbar/panels/templates.html b/debug_toolbar/templates/debug_toolbar/panels/templates.html
index 6c918b1..e54c951 100644
--- a/debug_toolbar/templates/debug_toolbar/panels/templates.html
+++ b/debug_toolbar/templates/debug_toolbar/panels/templates.html
@@ -14,10 +14,12 @@
 {% for template in templates %}
 	<dt><strong><a class="remoteCall" href="/__debug__/template_source/?template={{ template.template.name }}">{{ template.template.name|addslashes }}</a></strong></dt>
 	<dd><samp>{{ template.template.origin_name|addslashes }}</samp></dd>
-	<dd>
-		<div class="djTemplateShowContextDiv"><a class="djTemplateShowContext">Toggle Context</a></div>
-		<div class="djTemplateHideContextDiv" style="display:none;"><pre>{{ template.context }}</pre></div>
-	</dd>
+	{% if template.context %}
+	    <dd>
+		    <div class="djTemplateShowContextDiv"><a class="djTemplateShowContext">Toggle Context</a></div>
+		    <div class="djTemplateHideContextDiv" style="display:none;"><pre>{{ template.context }}</pre></div>
+	    </dd>
+	{% endif %}
 {% endfor %}
 </dl>
 {% else %}