¿Cómo puedo representar una plantilla fuera de un controlador en Rails 3?

Question

Parece que no puedo renderizar una plantilla fuera de un controlador en mi aplicación Rails 3. La búsqueda en Google que he hecho ha sido útil, y finalmente encontré información útil al http://www.swombat.com/rails-rendering-templates-outside-of-a-contro. Sin embargo, esto parece estar roto en Rails 3. ¿Alguien tiene alguna idea de cómo puedo solucionar este método o tal vez conocer un mejor enfoque?

Mi método:

def render_erb(template_path, params) 
    view = ActionView::Base.new(ActionController::Base.view_paths, {}) 

    class << view 
    include ApplicationHelper 
    end 

    view.render(:file => "#{template_path}.html.erb", :locals => params) 
    end 

El error:

ActionView::Template::Error: ActionView::Template::Error 
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.0/lib/active_support/whiny_nil.rb:48:in `method_missing' 
    from /Users/mikegerstenblatt/Desktop/bluetrain/lib/test.html.erb:17:in `_lib_test_html_erb__366962844_2173671680_68830' 
    from /Library/Ruby/Gems/1.8/gems/actionpack-3.0.0/lib/action_view/template.rb:135:in `send' 
    from /Library/Ruby/Gems/1.8/gems/actionpack-3.0.0/lib/action_view/template.rb:135:in `render' 
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.0/lib/active_support/notifications.rb:54:in `instrument' 
    from /Library/Ruby/Gems/1.8/gems/actionpack-3.0.0/lib/action_view/template.rb:127:in `render' 
    from /Library/Ruby/Gems/1.8/gems/actionpack-3.0.0/lib/action_view/render/rendering.rb:59:in `_render_template' 
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.0/lib/active_support/notifications.rb:52:in `instrument' 
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.0/lib/active_support/notifications/instrumenter.rb:21:in `instrument' 
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.0/lib/active_support/notifications.rb:52:in `instrument' 
    from /Library/Ruby/Gems/1.8/gems/actionpack-3.0.0/lib/action_view/render/rendering.rb:56:in `_render_template' 
    from /Library/Ruby/Gems/1.8/gems/actionpack-3.0.0/lib/action_view/render/rendering.rb:26:in `render' 
    from /Users/mikegerstenblatt/Desktop/bluetrain/app/models/generated_website.rb:45:in `render_erb' 
    from (irb):2 

Answer 1

hice un blog post y una gist que lo explica.

Esencialmente, usted tiene que hacer esto:

class HelloWorldController < AbstractController::Base 
    include AbstractController::Rendering 
    include AbstractController::Layouts 
    include AbstractController::Helpers 
    include AbstractController::Translation 
    include AbstractController::AssetPaths 
    include ActionController::UrlWriter 

    self.view_paths = "app/views" 

    def show; end 
end 

y luego:

HelloWorldController.new.show 

volverá vista renderizada en una cadena.

Answer 2

Aprovechando el enfoque que sugirió Hubert, terminé con lo siguiente en mi proyecto de Rails 3.1.

que necesitaba para rendir un parcial en una vista normal y también volver a utilizarlo en un activo (bajo APP/activos/javascript)

<% 
class FauxController < AbstractController::Base 
    include AbstractController::Rendering 
    # I didn't need layouts, translation or assetpaths, YMMV 
    include AbstractController::Helpers 
    include Rails.application.routes.url_helpers 
    helper MyHelper # the partial references some helpers in here 

    # Make sure we can find views: 
    self.view_paths = Rails.application.config.paths["app/views"] 

    def show 
    render :partial => "/my_controller/my_partial.js" 
    end 
end 

%> 
<%= FauxController.new.show %> 

Answer 3

Puede utilizar joya render_anywhere para hacer que la plantilla fuera del controlador . https://github.com/yappbox/render_anywhere