Sha256: c328cb60b624a257c946f7c541bf97e713d6549a3e3f7fcca92bd87d6eba6530
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Versions: 32
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Stored size: 1.92 KB
Contents
module Locomotive
module Mongoid
module Presenter
extend ActiveSupport::Concern
included do
# keep a link to the original as_json method from Mongoid
alias :as_json_from_mongoid :as_json
# keeps track of the presenter class
class << self; attr_writer :presenter_class end
end
# Get the presenter corresponding to the current document
#
# @return [ Object ] The presenter
#
def to_presenter(options = {})
return nil unless self.class.presenter_class
self.class.presenter_class.new(self, options)
end
# Set the attributes of the document by using
# the corresponding presenter.
#
# @param [ Hash ] attributes The document attributes
#
def from_presenter(attributes = {})
self.to_presenter.attributes = attributes
end
def as_json(options = {})
if presenter = self.to_presenter(options)
presenter.as_json
else
self.as_json_from_mongoid(options)
end
end
module ClassMethods
# Return the memoized presenter class if it exists.
#
# @return [ Class ] The presenter class
#
def presenter_class
return @presenter_class if @presenter_class
_name = "Locomotive::#{name.demodulize}Presenter"
@presenter_class = _name.constantize rescue nil
end
# Initialize an instance of the document by passing
# attributes calculated by the associated presenter.
#
# @param [ Hash ] attributes The document attributes
#
# @return [ Object ] A new document instance filled with the parameters
#
def from_presenter(attributes)
new.tap do |document|
presenter = document.to_presenter
presenter.attributes = attributes
end
end
end
end
end
end
Version data entries
32 entries across 32 versions & 2 rubygems