Contents

class RestModel
  class Association < Key
    attr_reader :many

    def initialize(name, options = {})
      super
      @many       = options.fetch(:many, false)
      @class_name = options.fetch(:class_name, default_class_name).to_s.camelize
    end

    def one?
      !many?
    end

    def many?
      @many
    end

    def default_class_name
      one? ? name : name.to_s.singularize
    end

    def resource_class
      @class_name.to_s.camelize.constantize
    end

    def from_hash(attrs, resource = nil)
      return nil if attrs.nil? or attrs.empty?
      resource ? update_from_hash(resource, attrs) : create_from_hash(attrs)
    end

    def create_from_hash(attrs)
      one? ? resource_class.new(attrs)
           : Array(attrs).map {|item| resource_class.new(item)}
    end

    def update_from_hash(resource, attrs)
      if one?
        resource.update_attributes(attrs)
      else
        if resource.count > attrs.count
          resource = resource.to(attrs.count - 1)
        end

        attrs.each_with_index do |item, index|
          if index < resource.count
            resource[index].update_attributes(item)
          else
            resource << create_from_hash(item)
          end
        end

        resource
      end
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
rest_model-0.1.3	lib/rest_model/key/association.rb
rest_model-0.1.2	lib/rest_model/key/association.rb
rest_model-0.1.1	lib/rest_model/key/association.rb