instance method `changes`

Ruby on Rails 5.2.8.1

Since v3.0.20

Available in: v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

changes()

Returns a hash of changed attributes indicating their original and new values like attr => [original value, new value].

person.changes # => {}
person.name = 'bob'
person.changes # => { "name" => ["bill", "bob"] }

Source

# File activemodel/lib/active_model/dirty.rb, line 234
    def changes
      cache_changed_attributes do
        ActiveSupport::HashWithIndifferentAccess[changed.map { |attr| [attr, attribute_change(attr)] }]
      end
    end

Defined in activemodel/lib/active_model/dirty.rb line 234 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveModel::Dirty

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