------ art_1003_29647373.1222387765472 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline On Wed, Sep 24, 2008 at 12:43 AM, Charles Oliver Nutter < charles.nutter / sun.com> wrote: > Paul Brannan wrote: > >> I'm unclear why this couldn't be implemented using #inherited. >> > > It certainly could, but that requires that you have freedom to install your > inherited hook ahead of time and that you don't interfere with an existing > hook and that hooks added after yours reciprocate and that you do all the > bookkeeping yourself, including dealing with your concern below. It's a lot > of hassle for a feature that has obvious utility. FWIW Rails is a bit inconsistent here. ActiveSupport implements Class#subclasses to return an array of class names using ObjectSpace ActiveRecord::Base implements a subclasses class method using #inherited, which returns an array of class Objects. I discovered this in our Rails app at work when facets got exorcised, facets implements Class#subclasses using ObjectSpace and returns an array of class objects. -- Rick DeNatale My blog on Ruby http://talklikeaduck.denhaven2.com/ ------ art_1003_29647373.1222387765472 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline <div dir tr">On Wed, Sep 24, 2008 at 12:43 AM, Charles Oliver Nutter <span dir tr"><<a href ailto:charles.nutter / sun.com">charles.nutter / sun.com</a>></span> wrote:<br><div class mail_quote"><blockquote class mail_quote" style order-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class h2E3d">Paul Brannan wrote:<br> <blockquote class mail_quote" style order-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I'm unclear why this couldn't be implemented using #inherited.<br> </blockquote> <br></div> It certainly could, but that requires that you have freedom to install your inherited hook ahead of time and that you don't interfere with an existing hook and that hooks added after yours reciprocate and that you do all the bookkeeping yourself, including dealing with your concern below. It's a lot of hassle for a feature that has obvious utility.</blockquote> </div><br>FWIW<br><br>Rails is a bit inconsistent here.<br><br>ActiveSupport implements Class#subclasses to return an array of class names using ObjectSpace<br><br>ActiveRecord::Base implements a subclasses class method using #inherited, which returns an array of class Objects.<br> <br>I discovered this in our Rails app at work when facets got exorcised, facets implements Class#subclasses using ObjectSpace and returns an array of class objects.<br clear ll"><br>-- <br>Rick DeNatale<br><br>My blog on Ruby<br> <a href ttp://talklikeaduck.denhaven2.com/">http://talklikeaduck.denhaven2.com/</a><br> </div> ------ art_1003_29647373.1222387765472--