From bb32bcef8f22fe0b126beff7a21f54da1e58f6c9 Mon Sep 17 00:00:00 2001
From: Adrian Moennich <adrian.moennich@cern.ch>
Date: Wed, 22 Oct 2014 18:12:44 +0200
Subject: [PATCH] Fail if search plugin is loaded but no engines

---
 search/indico_search/controllers.py |  2 +-
 search/indico_search/plugin.py      | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/search/indico_search/controllers.py b/search/indico_search/controllers.py
index 656ef3c..8d03391 100644
--- a/search/indico_search/controllers.py
+++ b/search/indico_search/controllers.py
@@ -16,7 +16,7 @@
 
 from __future__ import unicode_literals
 
-from flask import request, session
+from flask import request
 from flask_pluginengine import current_plugin
 
 from MaKaC.conference import ConferenceHolder, Conference, CategoryManager
diff --git a/search/indico_search/plugin.py b/search/indico_search/plugin.py
index fd1d46a..c0cd9c1 100644
--- a/search/indico_search/plugin.py
+++ b/search/indico_search/plugin.py
@@ -16,6 +16,8 @@
 
 from __future__ import unicode_literals
 
+from flask_pluginengine import plugins_loaded
+
 from indico.core.plugins import IndicoPlugin
 
 from indico_search.blueprint import blueprint
@@ -30,6 +32,14 @@ class SearchPlugin(IndicoPlugin):
     hidden = True
     _engine_plugin = None  # the search engine plugin
 
+    def init(self):
+        super(SearchPlugin, self).init()
+        self.connect(plugins_loaded, self._plugins_loaded, sender=self.app)
+
+    def _plugins_loaded(self, sender, **kwargs):
+        if not self.engine_plugin:
+            raise RuntimeError('Search plugin active but no search engine plugin loaded')
+
     @property
     def engine_plugin(self):
         return self._engine_plugin