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我试图在我的 Rails 控制台中运行以下行：

ActiveRecord::Base.connection.execute "DELETE FROM recommendations WHERE place_id=4000000001267 AND recommender_id=2728498;UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=4000000564630 AND recommender_id=2728498;"

它只是删除旧记录并重写另一条记录以进行合并。

Rails 控制台返回以下内容：

DELETE FROM recommendations WHERE place_id=4000000001267 AND recommender_id=2728498;UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=4000000564630 AND recommender_id=2728498; ActiveRecord::StatementInvalid: Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=40000005' at line 1: DELETE FROM recommendations WHERE place_id=4000000001267 AND recommender_id=2728498;UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=4000000564630 AND recommender_id=2728498; from /Users/huynguyen/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:243:in查询'`

但是，当我在 Sequel Pro 中运行这个精确查询时，查询运行得非常好。知道发生了什么吗？

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它可能与 AR 的 mysql 适配器默认没有执行多个查询有关吗？

对此的快速解决方法是将查询分成两个不同的并一个接一个地执行它们。并将它们包装成一个事务，当然:)

于 2012-11-09T01:50:33.360 回答