Add adapter to list urls to be purged

src/collective/liveblog/caching/configure.zcml

@@ -27,4 +27,7 @@
       ruleset="collective.liveblog.recent_updades"
       />
 
+  <!-- Purge paths for LiveBlog -->
+  <adapter factory=".purge.LiveBlogPurgePaths" name="liveblog" />
+
 </configure>

src/collective/liveblog/caching/purge.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+from collective.liveblog.interfaces import ILiveblog
+from plone.app.caching.purge import ContentPurgePaths
+from z3c.caching.interfaces import IPurgePaths
+from zope.component import adapts
+from zope.interface import implements
+
+
+class LiveBlogPurgePaths(ContentPurgePaths):
+    """Paths to purge for LiveBlog
+    """
+
+    implements(IPurgePaths)
+    adapts(ILiveblog)
+
+    def getRelativePaths(self):
+        paths = super(LiveBlogPurgePaths, self).getRelativePaths()
+        context = self.context
+        url = context.absolute_url()
+        # Also adds recent-updates view to the list of urls to be purged
+        paths.append('{0}/recent-updates'.format(url))
+        return paths