给城市增加图片

add_image_to_city

Dir.glob("/home/ubuntu/cities/*").each do |f|
  city_id = File.basename(f, ".png")
  c = City.find_by_id(city_id)
  if c.nil?
    puts "-"*80
    puts city_id
    puts "-"*80
  else
    if c.cover.nil?
      c.create_cover(image: File.open(f)) if c.cover.try(:image).nil?
    end
  end
end