class ChangeMonitoringDataFormatOnMonitoring < ActiveRecord::Migration[6.0]
  def change
    MonitoringChild.all.each do |mc|
      if(mc.monitoring_data.is_a? String)
        mc.monitoring_data = JSON.parse(mc.monitoring_data.gsub("=>", ":"))
        mc.save
      end
    end
  end
end