From c4b6357a9908fb05261efa8764e5c8a6d8727b96 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 16 Aug 2013 10:57:32 +0200
Subject: Implement soft delete for persistent classes

---
 odb/validator.cxx | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'odb/validator.cxx')

diff --git a/odb/validator.cxx b/odb/validator.cxx
index 080aaa4..2b0b46e 100644
--- a/odb/validator.cxx
+++ b/odb/validator.cxx
@@ -326,6 +326,38 @@ namespace
     virtual void
     traverse_object (type& c)
     {
+      // Check the the deletion version makes sense.
+      //
+      if (unsigned long long v = deleted (c))
+      {
+        location_t l (c.get<location_t> ("deleted-location"));
+
+        if (!versioned ())
+        {
+          error (l) << "deleted member in non-versioned object model" << endl;
+          valid_ = false;
+        }
+        else
+        {
+          model_version const& mv (version ());
+
+          if (v > mv.current)
+          {
+            error (l) << "deletion version is greater than the current " <<
+              "model version" << endl;
+            valid_ = false;
+          }
+          else if (v <= mv.base)
+          {
+            error (l) << "deletion version is less than or equal to the " <<
+              "base model version" << endl;
+            info (c.location ()) << "delete this class since migration to " <<
+              "version " << v << " is no longer possible" << endl;
+            valid_ = false;
+          }
+        }
+      }
+
       // Check that the callback function exist.
       //
       if (c.count ("callback"))
-- 
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