Better way to return validation errors for nested models as json in Rails?

Updated to have the same format as Rails nested params

render json: {  order: {    entries: @order.entries.enum_for(:each_with_index).collect{|entry, index|      {        index => {          id: entry.id,          errors: entry.errors.to_hash,          members: entry.members.enum_for(:each_with_index).collect{|member, index|            {               index => {                id: member.id,                errors: member.errors.to_hash              }            } unless member.valid?          }.compact        }      } unless entry.valid?    }.compact  }}

You should get a JSON response like:

{  order: {    entries: [      0: {        id: 1, # nil, if new record        errors: {},        members: [          0: {            id: 7, # nil, if new record            errors: {              title: ["cant be blank"]            }          },          1: {            id: 13, # nil, if new record            errors: {              title: ["cant be blank"]            }          }        ]      }    ]  }}

P.S. Maybe others know a rails-integrated way of doing this. Otherwise, I would say this might be a good feature request for Rails in git.