module CanCan::ControllerResourceBuilder

def assign_attributes(resource)
  resource.send("#{parent_name}=", parent_resource) if @options[:singleton] && parent_resource
  initial_attributes.each do |attr_name, value|
    resource.send("#{attr_name}=", value)
  end
  resource
end

def build_resource
  resource = resource_base.new(resource_params || {})
  assign_attributes(resource)
end

def initial_attributes
  current_ability.attributes_for(@params[:action].to_sym, resource_class).delete_if do |key, _value|
    resource_params && resource_params.include?(key)
  end
end