Ruby-on-rails 从数据库中删除记录
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Deleting a record from database
提问by Justin Meltzer
In Ruby on Rails, is it @variable.deleteor @variable.destroy
在 Ruby on Rails 中，是@variable.delete还是@variable.destroy
回答by lebreeze
@variable.destroywill call all callbacks (before_destroy etc.) as well as ensure associations are respected. @variable.deletejust calls the raw database query to delete the object. You're generally much safer off using destroyeven if it's more expensive.
@variable.destroy将调用所有回调（before_destroy 等）并确保尊重关联。@variable.delete只是调用原始数据库查询来删除对象。destroy即使它更昂贵，您通常也更安全。
回答by Adam Lassek
Assuming that you're using ActiveRecord, and that @variableis an instance of an ActiveRecord::Basesubclass, you call @variable.destroy.
假设您使用的是 ActiveRecord，并且它@variable是一个ActiveRecord::Base子类的实例，则调用@variable.destroy.
