Generate database schema from database model instead of C++ model

We now first create the so-called database model from C++ model and
then use that to generate the database schema. The new approach also
adds more general support for primary/foreign keys, including multi-
column keys. Finally, for MySQL we now generate out-of-line foreign
key definitions. Because MySQL does not support deferred constraints
checking, deferred foreign keys are written commented out, for
documentation.

1 files changed, 16 insertions, 0 deletions

diff --git a/odb/relational/common.hxx b/odb/relational/common.hxx
index 92edba6..1627a74 100644
--- a/odb/relational/common.hxx
+++ b/odb/relational/common.hxx
@@ -318,12 +318,28 @@ namespace relational
   }
 
   template <typename T>
+  inline traversal::relational::edge_base&
+  operator>> (instance<T>& n, traversal::relational::edge_base& e)
+  {
+    n->edge_traverser (e);
+    return e;
+  }
+
+  template <typename T>
   inline traversal::node_base&
   operator>> (traversal::edge_base& e, instance<T>& n)
   {
     e.node_traverser (*n);
     return *n;
   }
+
+  template <typename T>
+  inline traversal::relational::node_base&
+  operator>> (traversal::relational::edge_base& e, instance<T>& n)
+  {
+    e.node_traverser (*n);
+    return *n;
+  }
 }
 
 #endif // ODB_RELATIONAL_COMMON_HXX