Use more defensive code for discoverable features.

Ingestion must suceeds whatever encountered issues.

Done by JPS


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41703 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/mixin/discoverable.py

@@ -66,7 +66,9 @@ class DiscoverableMixin(CachedConvertableMixin):
       user_login = str(getSecurityManager().getUser())
     method = self._getTypeBasedMethod('getPropertyDictFromUserLogin',
         fallback_script_id='Document_getPropertyDictFromUserLogin')
+    if method is not None:
       return method(user_login)
+    return {}
 
   security.declareProtected(Permissions.AccessContentsInformation,
                             'getPropertyDictFromContent')
@@ -82,7 +84,9 @@ class DiscoverableMixin(CachedConvertableMixin):
       return {}
     method = self._getTypeBasedMethod('getPropertyDictFromContent',
         fallback_script_id='Document_getPropertyDictFromContent')
+    if method is not None:
       return method()
+    return {}
 
   security.declareProtected(Permissions.AccessContentsInformation,
                             'getPropertyDictFromFilename')
@@ -106,7 +110,9 @@ class DiscoverableMixin(CachedConvertableMixin):
     to getPropertyDictFromInput.
     """
     method = self._getTypeBasedMethod('getPropertyDictFromInput')
+    if method is not None:
       return method(input_parameter_dict)
+    return {}
 
   ### Metadata disovery and ingestion methods
   security.declareProtected(Permissions.ModifyPortalContent,