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Class: ActiveSupport::Callbacks::CallbackChain

Do not use. This class is for internal use only.
Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, ::Enumerable, ::ActiveSupport::EnumerableCoreExt::Constants
Inherits: Object
Defined in: activesupport/lib/active_support/callbacks.rb

Class Method Summary

Instance Attribute Summary

::Enumerable - Included

#many?

Returns true if the enumerable has more than 1 element.

Instance Method Summary

::Enumerable - Included

#compact_blank

Returns a new ::Array without the blank items.
#exclude?

The negative of the Enumerable#include?.
#excluding

Returns a copy of the enumerable excluding the specified elements.
#in_order_of

Returns a new ::Array where the order has been set to that provided in the series, based on the key of the objects in the original enumerable.
#including

Returns a new array that includes the passed elements.
#index_by

Convert an enumerable to a hash, using the block result as the key and the element as the value.
#index_with

Convert an enumerable to a hash, using the element as the key and the block result as the value.
#maximum

Calculates the maximum from the extracted elements.
#minimum

Calculates the minimum from the extracted elements.
#pick

Extract the given key from the first element in the enumerable.
#pluck

Extract the given key from each element in the enumerable.
#sole

Returns the sole item in the enumerable.
#without

Alias for Enumerable#excluding.
#as_json

::ActiveSupport::EnumerableCoreExt::Constants - Included

#const_missing

Constructor Details

.new(name, config) ⇒ CallbackChain

[ GitHub ] 

  


# File 'activesupport/lib/active_support/callbacks.rb', line 571



def initialize(name, config)
  @name = name
  @config = {
    scope: [:kind],
    terminator: default_terminator
  }.merge!(config)
  @chain = []
  @all_callbacks = nil
  @single_callbacks = {}
  @mutex = Mutex.new
end


  







Instance Attribute Details



  

    #chain   (readonly, protected)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 640



attr_reader :chain


  








  

    #config   (readonly)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 569



attr_reader :name, :config


  








  

    #empty?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 585



def empty?;       @chain.empty?; end


  








  

    #name   (readonly)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 569



attr_reader :name, :config


  







Instance Method Details



  

    #append(*callbacks)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 631



def append(*callbacks)
  callbacks.each { |c| append_one(c) }
end


  








  

    #append_one(callback)   (private)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 643



def append_one(callback)
  @all_callbacks = nil
  @single_callbacks.clear
  remove_duplicates(callback)
  @chain.push(callback)
end


  








  

    #clear  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 599



def clear
  @all_callbacks = nil
  @single_callbacks.clear
  @chain.clear
  self
end


  








  

    #compile(type)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 613



def compile(type)
  if type.nil?
    @all_callbacks || @mutex.synchronize do
      final_sequence = CallbackSequence.new
      @all_callbacks ||= @chain.reverse.inject(final_sequence) do |callback_sequence, callback|
        callback.apply(callback_sequence)
      end
    end
  else
    @single_callbacks[type] || @mutex.synchronize do
      final_sequence = CallbackSequence.new
      @single_callbacks[type] ||= @chain.reverse.inject(final_sequence) do |callback_sequence, callback|
        type == callback.kind ? callback.apply(callback_sequence) : callback_sequence
      end
    end
  end
end


  








  

    #default_terminator   (private)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 663



def default_terminator
  Proc.new do |target, result_lambda|
    terminate = true
    catch(:abort) do
      result_lambda.call
      terminate = false
    end
    terminate
  end
end


  








  

    #delete(o)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 593



def delete(o)
  @all_callbacks = nil
  @single_callbacks.clear
  @chain.delete(o)
end


  








  

    #each(&block)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 583



def each(&block); @chain.each(&block); end


  








  

    #index(o)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 584



def index(o);     @chain.index(o); end


  








  

    #initialize_copy(other)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 606



def initialize_copy(other)
  @all_callbacks = nil
  @single_callbacks = {}
  @chain     = other.chain.dup
  @mutex     = Mutex.new
end


  








  

    #insert(index, o)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 587



def insert(index, o)
  @all_callbacks = nil
  @single_callbacks.clear
  @chain.insert(index, o)
end


  








  

    #prepend(*callbacks)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 635



def prepend(*callbacks)
  callbacks.each { |c| prepend_one(c) }
end


  








  

    #prepend_one(callback)   (private)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 650



def prepend_one(callback)
  @all_callbacks = nil
  @single_callbacks.clear
  remove_duplicates(callback)
  @chain.unshift(callback)
end


  








  

    #remove_duplicates(callback)   (private)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 657



def remove_duplicates(callback)
  @all_callbacks = nil
  @single_callbacks.clear
  @chain.delete_if { |c| callback.duplicates?(c) }
end