$db = Mysql2::Client.new(:host => 'localhost', :user => 'root', :password => '')
usedb = $db.query(%q{use ruby_nfcpy;})

$select_column = $db.query(%q{select id, name, idm, status from users;})
$select_name = $db.query(%q{select name from users;})
$select_idm = $db.query(%q{select idm from users;})
$select_status = $db.query(%q{select status from users;})

loop do
  unlock_user_id = idm(nfc)

  p unlock_user_id
  $select_idm.each do |user|
    user.each do |key, value|
      p value.to_i
      if value == unlock_user_id

a = 1
b = "1"

p (a == b) #=> false

a = 1
b = "1"

p (a == b.to_i) #=> true