Class: ActiveSupport::Callbacks::CallbackSequence

Inherits:
Object
  • Object
show all
Defined in:
activesupport/lib/active_support/callbacks.rb

Overview

Execute before and after filters in a sequence instead of chaining them with nested lambda calls, see: github.com/rails/rails/issues/18011

Instance Method Summary collapse

Constructor Details

#initialize(&call) ⇒ CallbackSequence

Returns a new instance of CallbackSequence.


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# File 'activesupport/lib/active_support/callbacks.rb', line 429

def initialize(&call)
  @call = call
  @before = []
  @after = []
end

Instance Method Details

#after(&after) ⇒ Object


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# File 'activesupport/lib/active_support/callbacks.rb', line 440

def after(&after)
  @after.push(after)
  self
end

#around(&around) ⇒ Object


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# File 'activesupport/lib/active_support/callbacks.rb', line 445

def around(&around)
  CallbackSequence.new do |arg|
    around.call(arg) {
      self.call(arg)
    }
  end
end

#before(&before) ⇒ Object


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# File 'activesupport/lib/active_support/callbacks.rb', line 435

def before(&before)
  @before.unshift(before)
  self
end

#call(arg) ⇒ Object


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# File 'activesupport/lib/active_support/callbacks.rb', line 453

def call(arg)
  @before.each { |b| b.call(arg) }
  value = @call.call(arg)
  @after.each { |a| a.call(arg) }
  value
end