迭代Ruby中pg_conn查询的所有值

Question

我有一个ruby脚本，我需要从数据库中检索所有值，并对每个检索到的内容执行操作。目前我很难对每个检索进行编码，但这仅在有3个值返回时才有效。我怎么能迭代这个？以下是我的代码：

  require 'pg'
  pg_conn = PGconn.connect(host = "main-pg-db-super.center.com", port = 6433, options = '', tty = '', 
                        dbname = "master_data", login = "user", password = "password")

  all_children = pg_conn.exec("SELECT id FROM pt.tests WHERE parent = '1';") # will return 3 results
  puts all_children[0]['id']
  puts all_children[1]['id']
  puts all_children[2]['id']

Answer 1

all_children.each do |child|
  puts child['id']
end

这不起作用吗？