allow undef for _setup_connect_do

diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm
index a049167..26fcbbb 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI.pm
+++ b/lib/DBIx/Class/Storage/DBI.pm
@@ -478,8 +478,11 @@ sub _setup_connect_do {
 
   my $val = shift;
 
-  $self->throw_exception("The value of $opt cannot be 'undef'")
-    unless defined $val;
+  if (not defined $val) {
+    $self->$accessor(undef);
+    $self->$store(undef);
+    return;
+  }
 
   my @store;