X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=catagits%2FCatalyst-Runtime.git;a=blobdiff_plain;f=lib%2FCatalyst%2FDispatchType%2FChained.pm;h=49fad32e5b793de0154b9043005e77840a12804e;hp=3b7502e95dceb08d61522d3d02be63d9b21ea3d7;hb=b9b89145c40b01ae04dc483f4f29c02cf08725be;hpb=3b9c081223446195cf979709aa33295d6e993f3f

diff --git a/lib/Catalyst/DispatchType/Chained.pm b/lib/Catalyst/DispatchType/Chained.pm
index 3b7502e..49fad32 100644
--- a/lib/Catalyst/DispatchType/Chained.pm
+++ b/lib/Catalyst/DispatchType/Chained.pm
@@ -39,6 +39,8 @@ Catalyst::DispatchType::Chained - Path Part DispatchType
 
 =head1 SYNOPSIS
 
+Path part matching, allowing several actions to sequentially take care of processing a request:
+
   #   root action - captures one argument after it
   sub foo_setup : Chained('/') PathPart('foo') CaptureArgs(1) {
       my ( $self, $c, $foo_arg ) = @_;
@@ -53,7 +55,16 @@ Catalyst::DispatchType::Chained - Path Part DispatchType
 
 =head1 DESCRIPTION
 
-See L</USAGE>.
+Dispatch type managing default behaviour.  For more information on
+dispatch types, see:
+
+=over 4
+
+=item * L<Catalyst::Manual::Intro> for how they affect application authors
+
+=item * L<Catalyst::DispatchType> for implementation information.
+
+=back
 
 =head1 METHODS
 
@@ -258,8 +269,13 @@ sub register {
           "Multiple Chained attributes not supported registering ${action}"
         );
     }
+    my $chained_to = $chained_attr[0];
+
+    Catalyst::Exception->throw(
+      "Actions cannot chain to themselves registering /${action}"
+    ) if ($chained_to eq '/' . $action);
 
-    my $children = ($self->_children_of->{ $chained_attr[0] } ||= {});
+    my $children = ($self->_children_of->{ $chained_to } ||= {});
 
     my @path_part = @{ $action->attributes->{PathPart} || [] };