Implement {query,execute}_{one,value}() shortcut functions

Useful in situations where the query is know to return at most one element
(*_one) or exactly one element (*_value).

1 files changed, 3 insertions, 4 deletions

diff --git a/relationship/driver.cxx b/relationship/driver.cxx
index 9af06a2..27a31b2 100644
--- a/relationship/driver.cxx
+++ b/relationship/driver.cxx
@@ -132,10 +132,9 @@ main (int argc, char* argv[])
       shared_ptr<employer> csi (db->load<employer> ("Complex Systems Inc"));
       shared_ptr<project> ch (db->load<project> ("Complex Hardware"));
 
-      result r (db->query<employee> (query::first == "John" &&
-                                     query::last == "Doe"));
-
-      shared_ptr<employee> john (r.begin ().load ());
+      shared_ptr<employee> john (
+        db->query_one<employee> (query::first == "John" &&
+                                 query::last == "Doe"));
 
       john->employer (csi);
       john->projects ().clear ();