【Rails】whereに配列を指定できる話

where(number: [配列])

発行されるSQLは「WHERE IN」の形になる。

 User.where(number: [1, 2])
=>   User Load (0.9ms)  SELECT `users`.* FROM `users` WHERE `users`.`number` IN (1, 2)
[#<User:0x000055eafc265790
  id: "XXXXXXXX",
  number: 1,
  firstname: "コナン",
  lastname: "江戸川",
  email: "[e-mail]">,
 #<User:0x000055eafc2656c8
  id: "YYYYYYYYY",
  number: 2,
  firstname: "平次",
  lastname: "服部",
  email: "[e-mail]">]