ActiveRecord 回调和验证的顺序是什么? [英] What is the order of ActiveRecord callbacks and validations?

问题描述

我想知道在创建 ActiveRecord 对象时回调和验证的调用顺序是什么.

I was wondering in what order are callbacks and validations called when an ActiveRecord object is created.

假设我有一些自定义验证 &回调如下:

Let’s say I have some custom validations & callbacks like the following:

validates :reference_code, :if => :reference_code, :on => :create
before_create :assign_reference

哪个会先运行?回调需要先发生，否则验证可能会失败.

which one will run first? The callback needs to happen first or else the validation may fail.

推荐答案

最新版本的 Rails 列表的最新版本可以在 ActiveRecord::Callbacks 文档.Rails 4、3 & 的列表2 个在下面.

The most-up-to-date version of this list for the latest version of Rails can be found in the ActiveRecord::Callbacks documentation. The lists for Rails 4, 3 & 2 are below.

可以在 Rails 4 中找到此列表的最新版本指南.

• before_validation
• after_validation
• before_save
• around_save
• before_create
• around_create
• after_create
• after_save
• after_commit/after_rollback

• before_validation
• after_validation
• before_save
• around_save
• before_update
• around_update
• after_update
• after_save
• after_commit/after_rollback

• before_destroy
• around_destroy
• after_destroy
• after_commit/after_rollback

该列表的最新版本可以在 Rails 3 指南.

The most up-to-date version of this list can be found in the Rails 3 Guides.

• before_validation
• after_validation
• before_save
• around_save
• before_create
• around_create
• after_create
• after_save

• before_validation
• after_validation
• before_save
• around_save
• before_update
• around_update
• after_update
• after_save

• before_destroy
• around_destroy
• after_destroy

此列表的最新版本可以在 Rails 2.3 指南

The most up-to-date version of this list can be found in the Rails 2.3 Guides

• before_validation
• before_validation_on_create
• after_validation
• after_validation_on_create
• before_save
• before_create
• INSERT 操作
• after_create
• after_save

• before_validation
• before_validation_on_update
• after_validation
• after_validation_on_update
• before_save
• before_update
• UPDATE 操作
• after_update
• after_save

• before_destroy
• DELETE 操作
• after_destroy

由于您需要先验证reference_code，assign_reference 方法可以在after_validation 回调或出现在它之后的任何回调中调用我在上面提供的列表.

Since you need to first validate the reference_code, the assign_reference method can be called in the after_validation callback or any callback appearing after it in the list I provided above.

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