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Contents
# Minimal example of a decorator
require_dependency 'post'
# DelegateClass(Post) does not delegate attribute methods
# in some environments:
# http://travis-ci.org/#!/gregbell/active_admin/jobs/2021466
#
class PostDecorator < SimpleDelegator
delegate :id, :to => :__getobj__
def self.decorate(object)
new(object)
end
def self.decorate_collection(collection)
DecoratedEnumerableProxy.new(collection)
end
def self.model_name
ActiveModel::Name.new Post
end
def decorator_method
'A method only available on the decorator'
end
# Minimal example of decorating a collection.
# A full example can be found in the draper project:
# https://github.com/jcasimir/draper/blob/master/lib/draper/decorated_enumerable_proxy.rb
class DecoratedEnumerableProxy < DelegateClass(ActiveRecord::Relation)
include Enumerable
delegate :as_json, :collect, :map, :each, :[], :all?, :include?, :first, :last, :shift, :to => :decorated_collection
def klass
PostDecorator
end
def wrapped_collection
__getobj__
end
def decorated_collection
@decorated_collection ||= wrapped_collection.collect { |member| klass.decorate(member) }
end
alias_method :to_ary, :decorated_collection
def each(&blk)
to_ary.each(&blk)
end
end
end
Version data entries
58 entries across 58 versions & 4 rubygems