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Class: ActionView::Renderer

Relationships & Source Files
Inherits: Object
Defined in: actionview/lib/action_view/renderer/renderer.rb

Overview

=====================

This is the main entry point for rendering. It basically delegates to other objects like TemplateRenderer and PartialRenderer which actually renders the template.

The Renderer will parse the options from the #render or #render_body method and render a partial or a template based on the options. The TemplateRenderer and PartialRenderer objects are wrappers which do all the setup and logic necessary to render a view and a new object is created each time #render is called.

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(lookup_context) ⇒ Renderer

[ GitHub ] 

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 20



def initialize(lookup_context)
  @lookup_context = lookup_context
end


  







Instance Attribute Details



  

    #lookup_context   (rw)
  

  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 18



attr_accessor :lookup_context


  







Instance Method Details



  

    #cache_hits  
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 54



def cache_hits # :nodoc:
  @cache_hits ||= {}
end


  








  

    #collection_from_object(object)   (private)
  

  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 105



def collection_from_object(object)
  object if object.respond_to?(:to_ary)
end


  








  

    #collection_from_options(options)   (private)
  

  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 98



def collection_from_options(options)
  if options.key?(:collection)
    collection = options[:collection]
    collection || []
  end
end


  








  

    #render(context, options, &block)  
  



  

    
Main render entry point shared by Action View and Action Controller.

  



  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 25



def render(context, options, &block)
  render_to_object(context, options, &block).body
end


  








  

    #render_body(context, options)  
  



  

    
Render but returns a valid ::Rack body. If fibers are defined, we return
a streaming body that renders the template piece by piece.


Note that partials are not supported to be rendered with streaming,
so in such cases, we just wrap them in an array.

  



  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 42



def render_body(context, options)
  if options.key?(:partial)
    [render_partial(context, options)]
  else
    StreamingTemplateRenderer.new(@lookup_context).render(context, options)
  end
end


  








  

    #render_partial(context, options, &block)  
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 50



def render_partial(context, options, &block) # :nodoc:
  render_partial_to_object(context, options, &block).body
end


  








  

    #render_partial_to_object(context, options, &block)   (private)
  

  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 63



def render_partial_to_object(context, options, &block)
  partial = options[:partial]
  if String === partial
    collection = collection_from_options(options)

    if collection
      # Collection + Partial
      renderer = CollectionRenderer.new(@lookup_context, options)
      renderer.render_collection_with_partial(collection, partial, context, block)
    else
      if options.key?(:object)
        # Object + Partial
        renderer = ObjectRenderer.new(@lookup_context, options)
        renderer.render_object_with_partial(options[:object], partial, context, block)
      else
        # Partial
        renderer = PartialRenderer.new(@lookup_context, options)
        renderer.render(partial, context, block)
      end
    end
  else
    collection = collection_from_object(partial) || collection_from_options(options)

    if collection
      # Collection + Derived Partial
      renderer = CollectionRenderer.new(@lookup_context, options)
      renderer.render_collection_derive_partial(collection, context, block)
    else
      # Object + Derived Partial
      renderer = ObjectRenderer.new(@lookup_context, options)
      renderer.render_object_derive_partial(partial, context, block)
    end
  end
end


  








  

    #render_template_to_object(context, options, &block)   (private)
  

  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 59



def render_template_to_object(context, options, &block)
  TemplateRenderer.new(@lookup_context).render(context, options, &block)
end


  








  

    #render_to_object(context, options, &block)  
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'actionview/lib/action_view/renderer/renderer.rb', line 29



def render_to_object(context, options, &block) # :nodoc:
  if options.key?(:partial)
    render_partial_to_object(context, options)
  else
    render_template_to_object(context, options, &block)
  end
end