instance method
previous_mutation_tracker
Ruby on Rails 5.1.7
Since v5.1.7 Last seen in v5.1.7 Private — implementation detail, not part of the public APISignature
previous_mutation_tracker()No documentation comment.
Source
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 314
def previous_mutation_tracker
@previous_mutation_tracker ||= NullMutationTracker.instance
end
Defined in activerecord/lib/active_record/attribute_methods/dirty.rb line 314
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Defined in ActiveRecord::AttributeMethods::Dirty