don't die on insert in firebird with no pk

diff --git a/lib/DBIx/Class/Storage/DBI/InterBase.pm b/lib/DBIx/Class/Storage/DBI/InterBase.pm
index 7487bd9..2e5d706 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/InterBase.pm
+++ b/lib/DBIx/Class/Storage/DBI/InterBase.pm
@@ -42,7 +42,7 @@ sub _prep_for_execute {
   if ($op eq 'insert') {
     $self->_auto_incs([]);
 
-    my @pk = $ident->_pri_cols;
+    my @pk = eval { local $@; $ident->_pri_cols };
     my %pk;
     @pk{@pk} = ();