在Java中，我们有像下面的java代码这样的批处理执行：
Statement statement = null;
statement = connection.createStatement();
statement.addBatch("update people set firstname='John' where id=123");
statement.addBatch("update people set firstname='Eric' where id=456");
statement.addBatch("update people set firstname='May' where id=789");
int[] recordsAffected = statement.executeBatch();
如何在rails ActiveRecord 中做同样的事情？
你可以尝试一下。看起来就像你所追求的。
# Updating multiple records:
people = { 1 => { "first_name" => "David" }, 2 => { "first_name" => "Jeremy" } }
Person.update(people.keys, people.values)
Quoted: https://cbabhusal.wordpress.com/2015/01/03/updating-multiple-records-at-the-same-time-rails-activerecord/ https://cbabhusal.wordpress.com/2015/01/03/updating-multiple-records-at-the-same-time-rails-activerecord/
为了满足职位要求，它可以翻译为：
people = {
123 => { "firstname" => "John" },
456 => { "firstname" => "Eric" },
789 => { "firstname" => "May" }
}
Person.update(people.keys, people.values)
请注意，将以上内容翻译成 SQL 仍然会产生多个查询
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