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Rails模型：has_many，验证规则的顺序重要吗？

[英]Rails Models: Does the order of has_many, validation rules matter?

原文 2016-08-07 18:08:41 6 2 ruby-on-rails

Curious about Rails models - in Hartl's Rails Tutorial, he has a User model that includes the following has_many :microposts attr_accessor :remember_token, :activation_token, :reset_token before_save :downcase_email before_create :create_activation_digest has_secure_password 对Rails模型感到好奇-在Hartl的Rails教程中，他有一个User模型，其中包括以下has_many :microposts attr_accessor :remember_token, :activation_token, :reset_token before_save :downcase_email before_create :create_activation_digest has_secure_password

My question is - does the order you put these in matter? 我的问题是-您将这些订单放入物质的顺序吗？

2 个解决方案

No not all. 不，不是全部。 You can declare these in anyone set of your choice. 您可以在自己选择的任何集合中声明它们。

I think that it is not necessary that validations follow any specific order. 我认为验证不必遵循任何特定顺序。 But you should keep your every validation flexible so that even if presence/length validation fails on any parameter, manipulation over it doesn't throw an error. 但是，您应该使每个验证都保持灵活，以便即使存在/长度验证对任何参数都失败，对其进行的操作也不会引发错误。
You can refer to this answer 你可以参考这个答案
Controlling the order of rails validations 控制Rails验证的顺序

Rails模型has_many - Rails models has_many

has_many在Rails中嵌套到许多模型 - has_many nested to many models in Rails

Rails has_many至has_many具有多个模型 - Rails has_many through for has_many with multiple models

Rails 4，命令has_many：through。它什么都不做 - Rails 4, order in has_many :through. It simply does nothing

在 Rails 中使用 has_many 嵌套模型 - Nested models with has_many in Rails

协会has_many Rails模型 - Association has_many Rails Models

has_many和belongs_to模型rails - has_many and belongs_to models rails

Has_many不同模型在Rails中的关联 - Has_many of different models association in Rails

针对has_many关联的Rails验证 - Rails validation for a has_many association

has_many属性上的Rails验证 - Rails Validation on has_many attribute

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相关问题 Rails模型has_many - Rails models has_many has_many在Rails中嵌套到许多模型 - has_many nested to many models in Rails Rails has_many至has_many具有多个模型 - Rails has_many through for has_many with multiple models Rails 4，命令has_many：through。它什么都不做 - Rails 4, order in has_many :through. It simply does nothing 在 Rails 中使用 has_many 嵌套模型 - Nested models with has_many in Rails 协会has_many Rails模型 - Association has_many Rails Models has_many和belongs_to模型rails - has_many and belongs_to models rails Has_many不同模型在Rails中的关联 - Has_many of different models association in Rails 针对has_many关联的Rails验证 - Rails validation for a has_many association has_many属性上的Rails验证 - Rails Validation on has_many attribute

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