Rails中是否有類似批量更新的內容？

Question

在Java中，我們有一批執行類似下面的Java代碼：

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(); 

如何做到在軌的ActiveRecord一樣嗎？

Answer 1

你可以試試這個。看起來像你在追求什麼。

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

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

要適合這個職位的要求，將其轉換爲：

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

請注意，轉換到上述SQL仍然產生多個查詢