Module: ActiveSupport::Autoload

Overview

Autoload and eager load conveniences for your library.

This module allows you to define autoloads based on Rails conventions (i.e. no need to define the path it is automatically guessed based on the filename) and also define a set of constants that needs to be eager loaded:

module MyLib
  extend ActiveSupport::Autoload

  autoload :Model

  eager_autoload do
    autoload :Cache
  end
end

Then your library can be eager loaded by simply calling:

MyLib.eager_load!

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(base) ⇒ Object

:nodoc:


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# File 'activesupport/lib/active_support/dependencies/autoload.rb', line 28

def self.extended(base) # :nodoc:
  if RUBY_VERSION < "3"
    base.class_eval do
      @_autoloads = nil
      @_under_path = nil
      @_at_path = nil
      @_eager_autoload = false
      @_eagerloaded_constants = nil
    end
  end
end

Instance Method Details

#autoload(const_name, path = @_at_path) ⇒ Object


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# File 'activesupport/lib/active_support/dependencies/autoload.rb', line 40

def autoload(const_name, path = @_at_path)
  unless path
    full = [name, @_under_path, const_name.to_s].compact.join("::")
    path = Inflector.underscore(full)
  end

  if @_eager_autoload
    @_eagerloaded_constants ||= []
    @_eagerloaded_constants << const_name
  end

  super const_name, path
end

#autoload_at(path) ⇒ Object


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# File 'activesupport/lib/active_support/dependencies/autoload.rb', line 61

def autoload_at(path)
  @_at_path, old_path = path, @_at_path
  yield
ensure
  @_at_path = old_path
end

#autoload_under(path) ⇒ Object


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# File 'activesupport/lib/active_support/dependencies/autoload.rb', line 54

def autoload_under(path)
  @_under_path, old_path = path, @_under_path
  yield
ensure
  @_under_path = old_path
end

#eager_autoloadObject


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# File 'activesupport/lib/active_support/dependencies/autoload.rb', line 68

def eager_autoload
  old_eager, @_eager_autoload = @_eager_autoload, true
  yield
ensure
  @_eager_autoload = old_eager
end

#eager_load!Object


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# File 'activesupport/lib/active_support/dependencies/autoload.rb', line 75

def eager_load!
  if @_eagerloaded_constants
    @_eagerloaded_constants.each { |const_name| const_get(const_name) }
    @_eagerloaded_constants = nil
  end
end