Rails中是否有类似批量更新的内容？

Question

在Java中，我们有一批执行类似下面的Java代码：

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(); 

如何做到在轨的ActiveRecord一样吗？

Answer 1

你可以试试这个。看起来像你在追求什么。

# Updating multiple records: 
people = { 1 => { "first_name" => "David" }, 2 => { "first_name" => "Jeremy" } } 
Person.update(people.keys, people.values) 

报价：https://cbabhusal.wordpress.com/2015/01/03/updating-multiple-records-at-the-same-time-rails-activerecord/

要适合这个职位的要求，将其转换为：

people = { 
    123 => { "firstname" => "John" }, 
    456 => { "firstname" => "Eric" }, 
    789 => { "firstname" => "May" } 
} 
Person.update(people.keys, people.values) 

请注意，转换到上述SQL仍然产生多个查询