serialize2.rb

module Scope
  def self.included(base)
    base.has_scope :with_name_like
    base.has_scope :with_title_like
  end
end

class PostsController < ApplicationController
  include Scope

  def index
    search_params = params[:post_search] || {}
    @posts = apply_scopes(Post, search_params)
  end
end

class PostProcessor
  include HasScope
  include Scope
  
  def process(scope_hash)
    posts = apply_scopes(Post.all, scope_hash)
    # ....
  end
end