--controller

def export_agent_impressions

export_start_time = Time.parse(params[:es_time]) + 7.hours

export_end_time = Time.parse(params[:ee_time]) + 31.hours

impressions = AgentImpression.where("created_at >= ? and created_at < ?", export_start_time, export_end_time).order("created_at desc")

respond_to do |format|

format.html

format.csv {send_data agent_impressions_csv(impressions), filename: "agent_impressions_#{time}.csv"}

end

end

--send_data csv data

def agent_impressions_csv(impressions)

CSV.generate(headers: true) do |csv|

columns = AgentImpression.column_names

csv << columns

impressions.each do |impression|

csv << columns.map{|c| impression[c]}

end

end