diff options
author | Michael Shepanski <michael@codesynthesis.com> | 2014-11-04 16:10:03 +1100 |
---|---|---|
committer | Boris Kolpackov <boris@codesynthesis.com> | 2014-11-10 16:43:00 +0200 |
commit | 6375147d5ae76a84dd64f1996cb0d9d501839db6 (patch) | |
tree | 1240e3b8c1567fde1ae11d0c93e5b38c15111506 /odb/database.hxx | |
parent | 1f217e38f7507758da1d33d46e675e801621aa38 (diff) |
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).
Diffstat (limited to 'odb/database.hxx')
-rw-r--r-- | odb/database.hxx | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/odb/database.hxx b/odb/database.hxx index 4e59aaf..1f56b7f 100644 --- a/odb/database.hxx +++ b/odb/database.hxx @@ -242,6 +242,56 @@ namespace odb result<T> query (const odb::query<T>&, bool cache = true); + // Query one API. + // + template <typename T> + typename object_traits<T>::pointer_type + query_one (); + + template <typename T> + bool + query_one (T& object); + + template <typename T> + T + query_value (); + + template <typename T> + typename object_traits<T>::pointer_type + query_one (const char*); + + template <typename T> + bool + query_one (const char*, T& object); + + template <typename T> + T + query_value (const char*); + + template <typename T> + typename object_traits<T>::pointer_type + query_one (const std::string&); + + template <typename T> + bool + query_one (const std::string&, T& object); + + template <typename T> + T + query_value (const std::string&); + + template <typename T> + typename object_traits<T>::pointer_type + query_one (const odb::query<T>&); + + template <typename T> + bool + query_one (const odb::query<T>&, T& object); + + template <typename T> + T + query_value (const odb::query<T>&); + // Query preparation. // template <typename T> @@ -487,6 +537,18 @@ namespace odb void erase_ (const typename object_traits<T>::pointer_type&); + template <typename T, database_id DB, typename Q> + typename object_traits<T>::pointer_type + query_one_ (const Q&); + + template <typename T, database_id DB, typename Q> + bool + query_one_ (const Q&, T&); + + template <typename T, database_id DB, typename Q> + T + query_value_ (const Q&); + template <typename T, database_id DB, class_kind kind = class_traits<T>::kind> |