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This guide teaches you how to hook into the life cycle of your Active Record . If any validations fail, the object will be marked as invalid and Active Record will
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This guide teaches you how to hook into the life cycle of your Active Record . If any validations fail, the object will be marked as invalid and Active Record will
Validates whether the value of the specified attributes are unique across the system. Useful for making sure that only one user can be named “davidhh".
For more examples of basic validation usage, see the Rails Guide for Active Record Validations. Take a few minutes to browse the helpers listed in Section 2.
Active Record allows you to validate the state of a model before it gets written into the database. There are several methods that you
2 Mar 2015 Contribute to rails-style-guide development by creating an account on (like validation) without the ActiveRecord database functionality use
11 Jul 2013 This post describes rules of thumb how to use presence validator for class User < ActiveRecord::Base belongs_to :account validates :account
This guide teaches you how to validate the state of objects before they go into the database using Active Record's validations feature. After reading this guide,

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February 2018