The same rails guides like you pasted before shows a simple example of "just a plugin" when it just extends the core class String.
As for the differences between Railties and Engines, I'll quote the docs (http://guides.rubyonrails.org/engines.html): "A Rails::Engine is nothing more than a Railtie with some initializers already set. And since Rails::Application and Rails::Plugin are engines, the same configuration described here can be used in all three." And extracting from the Engine doc: "it will automatically load models, controllers and helpers inside app, load routes at config/routes.rb, load locales at config/locales/*, and load tasks at lib/tasks/*." I think it will also add lib/assets to the assets path nowadays, but the doc might be outdated. On Tue, Jun 5, 2012 at 3:21 PM, Rodrigo Rosenfeld Rosas <rr.ro...@gmail.com> wrote: > > Em 05-06-2012 15:05, Luiz Felipe Garcia Pereira escreveu: > >> One word: Modularity >> >> If it's a simple plugin, it doesn't need to be a Railtie and inserted in >> rails > > > Could you please explain the differences about this and a regular Ruby gem? > > >> If it's something that extends rails/AR it can be a Railtie and take >> advantage of that. >> If it's an engine then it makes sense to add the Engine and have the extra >> tools Rails::Engine provides. > > > What kind of improvements/benefits would you expect by using the former > instead of the latter? > > If there is no real benefit, it would be better to always create an engine > and avoid user's confusion. > > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Core" group. > To post to this group, send email to rubyonrails-core@googlegroups.com. > To unsubscribe from this group, send email to > rubyonrails-core+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-core?hl=en. > -- Luiz Felipe G. Pereira -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Core" group. To post to this group, send email to rubyonrails-core@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-core+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-core?hl=en.