[Zope3-checkins] CVS: Zope3/lib/python/Zope/App/Caching - ICacheable.py:1.4

[Viktorija Zaksiene]

Update of /cvs-repository/Zope3/lib/python/Zope/App/Caching
In directory cvs.zope.org:/tmp/cvs-serv18481/lib/python/Zope/App/Caching

Modified Files:
	ICacheable.py 
Log Message:
ICacheable.allowed_values should not raise errors when there are no caching services

=== Zope3/lib/python/Zope/App/Caching/ICacheable.py 1.3 => 1.4 ===
--- Zope3/lib/python/Zope/App/Caching/ICacheable.py:1.3	Mon Nov 11 15:57:20 2002
+++ Zope3/lib/python/Zope/App/Caching/ICacheable.py	Wed Nov 13 06:30:31 2002
@@ -16,6 +16,7 @@
 """
 from Interface import Interface
 from Zope.ComponentArchitecture import getService
+from Zope.ComponentArchitecture.Exceptions import ComponentLookupError
 from Zope.ContextWrapper import ContextProperty
 import Zope.Schema
 
@@ -24,10 +25,12 @@
 
     def __allowed(self):
         """Note that this method works only if the Field is context wrapped."""
-        caching_service = getService(self.context, "Caching")
-
-        # FIXME: i18n
-        return [''] + list(caching_service.getAvailableCaches())
+        try:
+            caching_service = getService(self.context, "Caching")
+        except ComponentLookupError:
+            return ['']
+        else:
+            return [''] + list(caching_service.getAvailableCaches())
 
     allowed_values = ContextProperty(__allowed)