Using AMS? Whitelist includes to avoid overuse and n+1 slowness

example.rb

# Somewhere, maybe in ApplicationController
def whitelist_relationships(params)
  whitelist = %w(driver seats driver.avatar)
  params[:include].split(/,/) & whitelist if params[:include].present?
end

# Then when rendering the resource
render json: Array(@resources), root: :trips, include: whitelist_relationships(params)

params[:include] might have an array, instead of a String.

whitelist = %w(...)
params[:include] = params[:include].split(/,/) if params[:include].is_a?(String)
params[:include] & whitelist

That doesn't work either, because of nil

whitelist = %w(...)
params[:include] = params[:include].split(/,/) if params[:include].is_a?(String)
Array(params[:include]) & whitelist