require 'active_model_serializers/adapter/null' module ActiveModel class Serializer module Adapter class Null < DelegateClass(ActiveModelSerializers::Adapter::Null) def initialize(serializer, options = {}) warn "Calling deprecated #{self.class.name} (#{__FILE__}) from #{caller[0..2].join(', ')}. Please use #{self.class.name.sub('ActiveModel::Serializer', 'ActiveModelSerializers')}" super(ActiveModelSerializers::Adapter::Null.new(serializer, options)) end end end end end