Add support for data migration

1 files changed, 181 insertions, 0 deletions

diff --git a/evolution/data/driver.cxx b/evolution/data/driver.cxx
new file mode 100644
index 0000000..0a700c7
--- /dev/null
+++ b/evolution/data/driver.cxx
@@ -0,0 +1,181 @@
+// file      : evolution/data/driver.cxx
+// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+// Test data migration support.
+//
+
+#include <memory>   // std::auto_ptr
+#include <cassert>
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+#include <odb/schema-catalog.hxx>
+
+#include <common/config.hxx>  // DATABASE_XXX, HAVE_CXX11
+#include <common/common.hxx>
+
+#include "test2.hxx"
+#include "test3.hxx"
+#include "test2-odb.hxx"
+#include "test3-odb.hxx"
+
+using namespace std;
+using namespace odb::core;
+
+void
+migrate1 (database& db)
+{
+  using namespace v2;
+  using namespace v3;
+
+  auto_ptr<object1> o1 (db.load<object1> (1));
+  object2 o2 (1);
+  o2.num = o1->num;
+  db.persist (o2);
+}
+
+void
+migrate2 (database& db)
+{
+  using namespace v2;
+  using namespace v3;
+
+  auto_ptr<object1> o1 (db.load<object1> (2));
+  object2 o2 (2);
+  o2.num = o1->num;
+  db.persist (o2);
+}
+
+static const data_migration_entry migrate2_entry (3, &migrate2);
+
+int
+main (int argc, char* argv[])
+{
+  schema_catalog::data_migration_function (3, &migrate1);
+
+#ifdef HAVE_CXX11
+  schema_catalog::data_migration_function (
+    3,
+    [] (database& db)
+    {
+      using namespace v2;
+      using namespace v3;
+
+      auto_ptr<object1> o1 (db.load<object1> (11));
+      object2 o2 (11);
+      o2.num = o1->num;
+      db.persist (o2);
+    });
+#endif
+
+  try
+  {
+    auto_ptr<database> db (create_database (argc, argv, false));
+    bool embedded (schema_catalog::exists (*db));
+
+    // 1 - base version
+    // 2 - migration
+    // 3 - current version
+    //
+    unsigned short pass (*argv[argc - 1] - '0');
+
+    switch (pass)
+    {
+    case 1:
+      {
+        using namespace v2;
+
+        if (embedded)
+        {
+          transaction t (db->begin ());
+          schema_catalog::drop_schema (*db);
+          schema_catalog::drop_schema (*db, "2");
+          schema_catalog::create_schema (*db, "", false);
+          schema_catalog::migrate_schema (*db, 2);
+          t.commit ();
+        }
+
+        {
+          transaction t (db->begin ());
+
+          {
+            object1 o1 (1);
+            o1.num = 123;
+            db->persist (o1);
+          }
+
+          {
+            object1 o1 (2);
+            o1.num = 123;
+            db->persist (o1);
+          }
+
+#ifdef HAVE_CXX11
+          {
+            object1 o1 (11);
+            o1.num = 123;
+            db->persist (o1);
+          }
+#endif
+          t.commit ();
+        }
+        break;
+      }
+    case 2:
+      {
+        {
+          transaction t (db->begin ());
+
+          if (embedded)
+            schema_catalog::migrate (*db);
+          else
+            schema_catalog::migrate_data (*db);
+
+          t.commit ();
+        }
+
+        break;
+      }
+    case 3:
+      {
+        using namespace v3;
+
+        {
+          transaction t (db->begin ());
+
+          {
+            auto_ptr<object2> o2 (db->load<object2> (1));
+            assert (o2->num == 123);
+          }
+
+          {
+            auto_ptr<object2> o2 (db->load<object2> (2));
+            assert (o2->num == 123);
+          }
+
+#ifdef HAVE_CXX11
+          {
+            auto_ptr<object2> o2 (db->load<object2> (11));
+            assert (o2->num == 123);
+          }
+#endif
+          t.commit ();
+        }
+
+        break;
+      }
+    default:
+      {
+        cerr << "unknown pass number '" << argv[argc - 1] << "'" << endl;
+        return 1;
+      }
+    }
+  }
+  catch (const odb::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}