From 5e7e037dd8c593e727f5a9672a2564257194cb48 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sat, 28 Sep 2013 08:39:47 +0200
Subject: Don't ignore empty changesets

This can be useful, for example, in data-only migrations.
---
 odb/relational/changelog.cxx | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

(limited to 'odb')

diff --git a/odb/relational/changelog.cxx b/odb/relational/changelog.cxx
index 855ba65..d4d20f5 100644
--- a/odb/relational/changelog.cxx
+++ b/odb/relational/changelog.cxx
@@ -1094,8 +1094,6 @@ namespace relational
         throw operation_failed ();
       }
 
-
-
       // Build the new changelog.
       //
       model& oldm (old->model ());
@@ -1220,13 +1218,13 @@ namespace relational
       //
       if (mv.base != mv.current)
       {
+        // Add it even if it is empty. This can be useful, for example,
+        // for data-only migrations were the user relies on the database
+        // version being updated in the version table.
+        //
         changeset& c (diff (*last, m, *cl, in_name, ops, &mv));
-
-        if (!c.names_empty ())
-        {
-          g.new_edge<alters_model> (c, *last);
-          g.new_edge<contains_changeset> (*cl, c);
-        }
+        g.new_edge<alters_model> (c, *last);
+        g.new_edge<contains_changeset> (*cl, c);
       }
 
       return cl;
-- 
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