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Contents
# frozen_string_literal: true
module ActiveAdmin
# This class decorates a collection of objects delegating
# mehods to behave like an Array. It's used to decouple ActiveAdmin
# from Draper and thus being able to use PORO decorators as well.
#
# It's implementation is heavily based on the Draper::CollectionDecorator
# https://github.com/drapergem/draper/blob/aaa06bd2f1e219838b241a5534e7ca513edd1fe2/lib/draper/collection_decorator.rb
class CollectionDecorator
# @return the collection being decorated.
attr_reader :object
# @return [Class] the decorator class used to decorate each item, as set by {#initialize}.
attr_reader :decorator_class
array_methods = Array.instance_methods - Object.instance_methods
delegate :==, :as_json, *array_methods, to: :decorated_collection
def initialize(object, with:)
@object = object
@decorator_class = with
end
class << self
alias_method :decorate, :new
end
def decorated_collection
@decorated_collection ||= object.map { |item| decorator_class.new(item) }
end
end
end
Version data entries
22 entries across 22 versions & 1 rubygems