From f3e419f52b42cfefa9b3eedbde3697c8b95c92a7 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 22 Nov 2010 12:09:48 +0200
Subject: Make query result aware of session and const objects

---
 odb/mysql/forward.hxx |  2 ++
 odb/mysql/result.hxx  | 19 +++++++++++++------
 odb/mysql/result.txx  | 29 ++++++++++++++++++-----------
 3 files changed, 33 insertions(+), 17 deletions(-)

diff --git a/odb/mysql/forward.hxx b/odb/mysql/forward.hxx
index 3b36780..d334cb3 100644
--- a/odb/mysql/forward.hxx
+++ b/odb/mysql/forward.hxx
@@ -20,6 +20,8 @@ namespace odb
 
     // Implementation details.
     //
+    class select_statement;
+
     template <typename T>
     class object_statements;
 
diff --git a/odb/mysql/result.hxx b/odb/mysql/result.hxx
index fe4fcfb..336d46c 100644
--- a/odb/mysql/result.hxx
+++ b/odb/mysql/result.hxx
@@ -24,18 +24,25 @@ namespace odb
     class result_impl: public odb::result_impl<T>
     {
     public:
-      typedef object_traits<T> traits;
-      typedef typename traits::pointer_type pointer_type;
-      typedef typename traits::pointer_traits pointer_traits;
+      typedef typename odb::result_impl<T>::pointer_type pointer_type;
+      typedef typename odb::result_impl<T>::pointer_traits pointer_traits;
+
+      typedef typename odb::result_impl<T>::object_type object_type;
+      typedef typename odb::result_impl<T>::id_type id_type;
+      typedef typename odb::result_impl<T>::object_traits object_traits;
+
 
       virtual
       ~result_impl ();
 
       result_impl (details::shared_ptr<select_statement> statement,
-                   object_statements<T>& statements);
+                   object_statements<object_type>& statements);
 
       virtual void
-      current (T&);
+      current (object_type&);
+
+      virtual id_type
+      current_id ();
 
       virtual void
       next ();
@@ -50,7 +57,7 @@ namespace odb
 
     private:
       details::shared_ptr<select_statement> statement_;
-      object_statements<T>& statements_;
+      object_statements<object_type>& statements_;
     };
   }
 }
diff --git a/odb/mysql/result.txx b/odb/mysql/result.txx
index c342b17..bb1fe01 100644
--- a/odb/mysql/result.txx
+++ b/odb/mysql/result.txx
@@ -16,19 +16,26 @@ namespace odb
     template <typename T>
     result_impl<T>::
     result_impl (details::shared_ptr<select_statement> statement,
-                 object_statements<T>& statements)
-        : statement_ (statement), statements_ (statements)
+                 object_statements<object_type>& statements)
+        : odb::result_impl<T> (statements.connection ().database ()),
+          statement_ (statement),
+          statements_ (statements)
     {
       next ();
     }
 
     template <typename T>
     void result_impl<T>::
-    current (T& x)
+    current (object_type& x)
     {
-      if (!this->end_)
-        traits::init (
-          x, statements_.image (), statements_.connection ().database ());
+      object_traits::init (x, statements_.image (), this->database ());
+    }
+
+    template <typename T>
+    typename result_impl<T>::id_type result_impl<T>::
+    current_id ()
+    {
+      return object_traits::id (statements_.image ());
     }
 
     template <typename T>
@@ -42,12 +49,12 @@ namespace odb
       //
       if (statement_->cached ())
       {
-        typename traits::image_type& im (statements_.image ());
+        typename object_traits::image_type& im (statements_.image ());
 
         if (im.version != statements_.out_image_version ())
         {
           binding& b (statements_.out_image_binding ());
-          traits::bind (b.bind, im, true);
+          object_traits::bind (b.bind, im, true);
           statements_.out_image_version (im.version);
           b.version++;
         }
@@ -59,13 +66,13 @@ namespace odb
       {
       case select_statement::truncated:
         {
-          typename traits::image_type& im (statements_.image ());
-          traits::grow (im, statements_.out_image_error ());
+          typename object_traits::image_type& im (statements_.image ());
+          object_traits::grow (im, statements_.out_image_error ());
 
           if (im.version != statements_.out_image_version ())
           {
             binding& b (statements_.out_image_binding ());
-            traits::bind (b.bind, im, true);
+            object_traits::bind (b.bind, im, true);
             statements_.out_image_version (im.version);
             b.version++;
             statement_->refetch ();
-- 
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