method

*_will_change!

Importance_1
Ruby on Rails latest stable (v6.1.7.7) - 0 notes - Class: ActiveModel::Dirty
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*_will_change! public

This method is generated for each attribute.

If an attribute is modified in-place then make use of *_will_change! to mark that the attribute is changing. Otherwise Active Model can’t track changes to in-place attributes. Note that Active Record can detect in-place modifications automatically. You do not need to call *_will_change! on Active Record models.

person = Person.new('Sandy')
person.name_will_change!
person.name_change # => ['Sandy', 'Sandy']
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