1 files changed, 6 insertions, 0 deletions
diff --git a/jt b/jt
index 1b7a193..b1a96bf 100755
--- a/jt
+++ b/jt
@@ -118,6 +118,8 @@ class NewCommand(Command):
 
         self._app.settings.require('source')
         topic = self._app.settings['topic']
+        if topic and not self._topic_page_exists(topic):
+            raise cliapp.AppException('Topic %s does not exist yet' % topic)
 
         values = {
             'title': args[0],
@@ -130,6 +132,10 @@ class NewCommand(Command):
         draft_id = drafts_dir.create_draft(template % values)
         self._app.edit_file(drafts_dir.get_draft_pathname(draft_id))
 
+    def _topic_page_exists(self, topic):
+        pathname = os.path.join(self._app.settings['source'], topic + '.mdwn')
+        return os.path.exists(pathname)
+
     def _get_topic_link(self, topic):
         if topic:
             return 'Part of [[%s]]' % topic