valid_options

# File activerecord/lib/active_record/associations/builder/has_many.rb, line 9
    def self.valid_options(options)
      valid = super + [:counter_cache, :join_table, :index_errors, :as, :through]
      valid += [:foreign_type] if options[:as]
      valid += [:source, :source_type, :disable_joins] if options[:through]
      valid += [:ensuring_owner_was] if options[:dependent] == :destroy_async
      valid
    end