# Pastebin 0Q167AyW
irb(main):004:0> file = File.open("public/apple-touch-icon.png"); user = User.first; user.avatar.attach(io: file, identify: false)
  User Load (1.9ms)  SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT ?  [["LIMIT", 1]]
^CTraceback (most recent call last):
       16: from app/models/user.rb:14:in `send_to_active_storage'
       15: from app/models/user.rb:14:in `send_to_active_storage'
       14: from app/models/user.rb:14:in `send_to_active_storage'
       13: from app/models/user.rb:14:in `send_to_active_storage'
       12: from app/models/user.rb:14:in `send_to_active_storage'
       11: from app/models/user.rb:14:in `send_to_active_storage'
       10: from app/models/user.rb:14:in `send_to_active_storage'
        9: from app/models/user.rb:14:in `send_to_active_storage'
        8: from app/models/user.rb:14:in `send_to_active_storage'
        7: from app/models/user.rb:14:in `send_to_active_storage'
        6: from app/models/user.rb:14:in `send_to_active_storage'
        5: from app/models/user.rb:14:in `send_to_active_storage'
        4: from app/models/user.rb:14:in `send_to_active_storage'
        3: from app/models/user.rb:14:in `send_to_active_storage'
        2: from app/models/user.rb:14:in `send_to_active_storage'
        1: from app/models/user.rb:14:in `send_to_active_storage'