class ChartsController < ApplicationController
  def index
    readouts = current_user.readouts.includes(:quantity, :unit).order(:taken_at, :id)
    @readouts_json = readouts.map { |r|
      { takenAt: r.taken_at&.iso8601,
        quantityId: r.quantity_id,
        quantityName: r.quantity.name,
        value: r.value.to_f,
        unit: r.unit.symbol }
    }.to_json
  end
end