Add persist(const) version, make update()'s argument const

2 files changed, 19 insertions, 2 deletions

diff --git a/odb/database.hxx b/odb/database.hxx
index ab80da4..4858f0f 100644
--- a/odb/database.hxx
+++ b/odb/database.hxx
@@ -35,6 +35,10 @@ namespace odb
     //
     template <typename T>
     typename object_traits<T>::id_type
+    persist (const T& object);
+
+    template <typename T>
+    typename object_traits<T>::id_type
     persist (T& object);
 
     // Throw object_not_persistent if not found.
@@ -61,7 +65,7 @@ namespace odb
     //
     template <typename T>
     void
-    update (T& object);
+    update (const T& object);
 
     // Make the object transient. Throw object_not_persistent if not
     // found.
diff --git a/odb/database.txx b/odb/database.txx
index f5449b6..a94f471 100644
--- a/odb/database.txx
+++ b/odb/database.txx
@@ -10,6 +10,19 @@ namespace odb
 {
   template <typename T>
   typename object_traits<T>::id_type database::
+  persist (const T& obj)
+  {
+    typedef object_traits<T> traits;
+
+    if (!transaction::has_current ())
+      throw not_in_transaction ();
+
+    traits::persist (*this, obj);
+    return traits::id (obj);
+  }
+
+  template <typename T>
+  typename object_traits<T>::id_type database::
   persist (T& obj)
   {
     typedef object_traits<T> traits;
@@ -64,7 +77,7 @@ namespace odb
 
   template <typename T>
   void database::
-  update (T& obj)
+  update (const T& obj)
   {
     if (!transaction::has_current ())
       throw not_in_transaction ();