From 8653e24fba1721fe4a87397b31f911d7fe33f32c Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 25 Apr 2013 10:46:33 +0200
Subject: Add support for data migration

---
 evolution/data/model.hxx | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 evolution/data/model.hxx

(limited to 'evolution/data/model.hxx')

diff --git a/evolution/data/model.hxx b/evolution/data/model.hxx
new file mode 100644
index 0000000..db49a44
--- /dev/null
+++ b/evolution/data/model.hxx
@@ -0,0 +1,46 @@
+// file      : evolution/data/model.hxx
+// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef MODEL_VERSION
+#  error model.hxx included directly
+#endif
+
+#include <odb/core.hxx>
+
+#pragma db model version(1, MODEL_VERSION)
+
+#define MODEL_NAMESPACE_IMPL(V) v##V
+#define MODEL_NAMESPACE(V) MODEL_NAMESPACE_IMPL(V)
+
+namespace MODEL_NAMESPACE(MODEL_VERSION)
+{
+#if MODEL_VERSION == 2
+  #pragma db object
+  struct object1
+  {
+    object1 (unsigned long id = 0): id_ (id) {}
+
+    #pragma db id
+    unsigned long id_;
+
+    int num;
+  };
+#endif
+
+#if MODEL_VERSION == 3
+  #pragma db object
+  struct object2
+  {
+    object2 (unsigned long id = 0): id_ (id) {}
+
+    #pragma db id
+    unsigned long id_;
+
+    int num;
+  };
+#endif
+}
+
+#undef MODEL_NAMESPACE
+#undef MODEL_NAMESPACE_IMPL
-- 
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