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Class: ActionController::MimeResponds::Collector

Relationships & Source Files
Namespace Children
Classes:
VariantCollector
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, ::AbstractController::Collector
Inherits: Object
Defined in: actionpack/lib/action_controller/metal/mime_responds.rb

Overview

A container for responses available from the current controller for requests for different mime-types sent to a particular action.

The public controller methods #respond_to may be called with a block that is used to define responses to different mime-types, e.g. for #respond_to :

respond_to do |format|
  format.html
  format.xml { render xml: @people }
end

In this usage, the argument passed to the block (#format above) is an instance of the Collector class. This object serves as a container in which available responses can be stored by calling any of the dynamically generated, mime-type-specific methods such as html, xml etc on the Collector. Each response is represented by a corresponding block if present.

A subsequent call to #negotiate_format(request) will enable the Collector to determine which specific mime-type it should respond with for the current request, with this response then being accessible by calling #response.

Class Method Summary

Instance Attribute Summary

Instance Method Summary

::AbstractController::Collector - Included

#method_missing

Constructor Details

.new(mimes, variant = nil) ⇒ Collector

[ GitHub ] 

  


# File 'actionpack/lib/action_controller/metal/mime_responds.rb', line 255



def initialize(mimes, variant = nil)
  @responses = {}
  @variant = variant

  mimes.each { |mime| @responses[Mime[mime]] = nil }
end


  







Dynamic Method Handling

  

    This class handles dynamic methods through the method_missing method
      in the class AbstractController::Collector


Instance Attribute Details



  

    #any_response?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_controller/metal/mime_responds.rb', line 280



def any_response?
  !@responses.fetch(format, false) && @responses[Mime::ALL]
end


  








  

    #format   (rw)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_controller/metal/mime_responds.rb', line 253



attr_accessor :format


  







Instance Method Details



  

    #all(*args, &block)  
  



  

    

Alias for #any.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_controller/metal/mime_responds.rb', line 269



alias :all :any


  








  

    #any(*args, &block)  
    Also known as: #all
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_controller/metal/mime_responds.rb', line 262



def any(*args, &block)
  if args.any?
    args.each { |type| send(type, &block) }
  else
    custom(Mime::ALL, &block)
  end
end


  








  

    #custom(mime_type, &block)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_controller/metal/mime_responds.rb', line 271



def custom(mime_type, &block)
  mime_type = Mime::Type.lookup(mime_type.to_s) unless mime_type.is_a?(Mime::Type)
  @responses[mime_type] ||= if block_given?
    block
  else
    VariantCollector.new(@variant)
  end
end


  








  

    #negotiate_format(request)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_controller/metal/mime_responds.rb', line 297



def negotiate_format(request)
  @format = request.negotiate_mime(@responses.keys)
end


  








  

    #response  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_controller/metal/mime_responds.rb', line 284



def response
  response = @responses.fetch(format, @responses[Mime::ALL])
  if response.is_a?(VariantCollector) # `format.html.phone` - variant inline syntax
    response.variant
  elsif response.nil? || response.arity == 0 # `format.html` - just a format, call its block
    response
  else # `format.html{ |variant| variant.phone }` - variant block syntax
    variant_collector = VariantCollector.new(@variant)
    response.call(variant_collector) # call format block with variants collector
    variant_collector.variant
  end
end