Fix the unpacking of the refered table name under Firebird

This fixes a little glitch introduced in [3959], in case of "implicit FKs"
(that is, {{{ForeignKey("orders")}}}, where the field(s) is missing).

1 files changed, 4 insertions, 1 deletions

diff --git a/test/testlib/schema.py b/test/testlib/schema.py
index 96a81d5be..8151508d0 100644
--- a/test/testlib/schema.py
+++ b/test/testlib/schema.py
@@ -42,7 +42,10 @@ def Table(*args, **kw):
             if isinstance(ref, schema.Column):
                 name = ref.table.name
             else:
-                name = unpack(ref)[-2]
+                # take just the table name: on FB there cannot be
+                # a schema, so the first element is always the
+                # table name, possibly followed by the field name
+                name = unpack(ref)[0]
             print name, table_name
             if name == table_name:
                 if fk.ondelete is None: