check_cached_relation

# File activerecord/lib/active_record/relation/query_methods.rb, line 95
    def check_cached_relation # :nodoc:
      if defined?(@arel) && @arel
        @arel = nil
        ActiveSupport::Deprecation.warn(          Modifying already cached Relation. The cache will be reset. Use a          cloned Relation to prevent this warning..squish)
      end
    end