Combining data with sql relations about rom-http HOT 2 OPEN

class UsersRelation < ::ROM::Relation[:http]
    gateway :my_awesome_gateway

    schema(:users) do
      attribute :id, Types::Int
      attribute :login, Types::Strict::String
      attribute :car_id, Types::Int
      primary_key :id
    end

    def by_id(id)
      with_path(id.to_s)
    end
  end

class CarsRelation < ::ROM::Relation[:sql]
  gateway :my_precious_gateway

  schema(:cars, infer: true)

  dataset do
    where(is_deleted: 0).order(:id)
  end

  def by_id(id)
    where(id: id)
  end

  def for_users(_assoc, users)
    where(id: users.map { |u| u[:car_id] })
  end
end

ROM::MapperMisconfiguredError ([[:id], [:name], [:create_date], [:change_date], [:description]] attribute: block is required for :from with union value.):