Thanks. Did the trick.

By context, do you mean being able to set the Page active within the
tag, or something more broad?

Marc

On Jan 13, 9:38 pm, William Ross <w...@spanner.org> wrote:
> On 13 Jan 2011, at 08:58, Marc wrote:
>
>
>
>
>
> > Hi,
>
> > I've been experimenting with adding a custom tag to Page, which works
> > when I have:
>
> > module UiTags
> >  include Radiant::Taggable
>
> >  desc "Returns the server host name"
> >  tag 'lsi:hostname' do |tag|
> >    CGI.escapeHTML(request.host()) unless request.nil?
> >  end
> > end
>
> > but not:
>
> > module UiTags
> >  include Radiant::Taggable
>
> >  desc "Returns the server host name"
> >  tag 'hostname' do |tag|
> >    CGI.escapeHTML(request.host()) unless request.nil?
> >  end
> > end
>
> > I get an error 'lsi' tag not defined… Which is strange since other
> > extensions use the prefix:name form. Radiant 0.9.1 and Rails 2.3.8.
>
> Have you got those the right way round? Should be an easy fix, though. The 
> error is literally correct, and you need to define a tag for the prefix too:
>
>         desc "Custom namespace"
>         tag 'lsi' do |tag|
>           tag.expand
>         end
>
>         desc "Returns the server host name"
>         tag 'lsi:hostname' do |tag|
>           CGI.escapeHTML(request.host()) unless request.nil?
>         end
>
> There may be useful work you can do to set context within the Isi tag, but 
> note that when you call <r:isi:hostname /> in that chained form the tag 
> attributes are not passed through to the prefix tag.
>
> best,
>
> will

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