From acd66db1ce8aa960b34710857ce990dd048cd3ae Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 8 Apr 2013 11:13:52 +0200
Subject: Generate add/drop foreign key migration statements

Also add the --fkeys-deferrable-mode option. General schemas generation
rework.
---
 evolution/add-foreign-key/driver.cxx | 140 +++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 evolution/add-foreign-key/driver.cxx

(limited to 'evolution/add-foreign-key/driver.cxx')

diff --git a/evolution/add-foreign-key/driver.cxx b/evolution/add-foreign-key/driver.cxx
new file mode 100644
index 0000000..0d62889
--- /dev/null
+++ b/evolution/add-foreign-key/driver.cxx
@@ -0,0 +1,140 @@
+// file      : evolution/add-foreign-key/driver.cxx
+// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+// Test adding a foreign key.
+//
+
+#include <memory>   // std::auto_ptr
+#include <cassert>
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+
+#include <common/common.hxx>
+
+#include "test1.hxx"
+#include "test2.hxx"
+#include "test1-odb.hxx"
+#include "test2-odb.hxx"
+
+using namespace std;
+using namespace odb::core;
+
+int
+main (int argc, char* argv[])
+{
+  try
+  {
+    auto_ptr<database> db (create_database (argc, argv));
+
+    // 1 - base version
+    // 2 - migration
+    // 3 - current version
+    //
+    unsigned short pass (*argv[argc - 1] - '0');
+
+    switch (pass)
+    {
+    case 1:
+      {
+        using namespace v2;
+
+        object o (1);
+
+        {
+          transaction t (db->begin ());
+          db->persist (o);
+          t.commit ();
+        }
+        break;
+      }
+    case 2:
+      {
+        using namespace v3;
+
+        // Both pointers are now NULL.
+        //
+        {
+          transaction t (db->begin ());
+          auto_ptr<object> p (db->load<object> (1));
+
+          assert (p->o1 == 0 && p->o2 == 0);
+
+          // Migration. The foreign key constraint is not yet there.
+          //
+          p->o1 = new object1 (1);
+          p->o2 = new object2 (1);
+          db->update (*p);
+
+          t.commit ();
+        }
+
+        // Migration. Add the missing objects.
+        //
+        object1 o1 (1);
+        object2 o2 (1);
+
+        {
+          transaction t (db->begin ());
+          db->persist (o1);
+          db->persist (o2);
+          t.commit ();
+        }
+
+        break;
+      }
+    case 3:
+      {
+        using namespace v3;
+
+        {
+          transaction t (db->begin ());
+          auto_ptr<object> p (db->load<object> (1));
+          assert (p->o1->id_ == 1);
+          assert (p->o2->id_ == 1);
+          t.commit ();
+        }
+
+        // Now the foreign key constraint is there.
+        //
+        try
+        {
+          object o (2);
+          o.o1 = new object1 (2);
+          o.o2 = new object2 (2);
+
+          transaction t (db->begin ());
+          db->persist (o);
+          assert (false);
+        }
+        catch (const odb::exception& ) {}
+
+        // As well as the NOT NULL.
+        //
+        try
+        {
+          object o (3);
+          o.o2 = 0;
+
+          transaction t (db->begin ());
+          db->persist (o);
+          assert (false);
+        }
+        catch (const odb::exception& ) {}
+        break;
+      }
+    default:
+      {
+        cerr << "unknown pass number '" << argv[argc - 1] << "'" << endl;
+        return 1;
+      }
+    }
+  }
+  catch (const odb::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}
-- 
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