Module: Snapshotable::Model::InstanceMethods

Defined in:
lib/snapshotable/model.rb

Instance Method Summary collapse

Instance Method Details

#last_snapshot ⇒ Object 



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# File 'lib/snapshotable/model.rb', line 45

def last_snapshot
  snapshots.order(created_at: :desc).first
end

#last_snapshot_before(time = Time.now) ⇒ Object 



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# File 'lib/snapshotable/model.rb', line 41

def last_snapshot_before(time = Time.now)
  snapshots.order(created_at: :desc).where('created_at < ?', time).first
end

#should_create_new_snapshot?(snapshot) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/snapshotable/model.rb', line 53

def should_create_new_snapshot?(snapshot)
  return true if last_snapshot.nil?

  snapshot_to_compare = last_snapshot
                        .attributes
                        .except(*self.class.attributes_to_ignore_on_diff)
                        .with_indifferent_access

  HashDiff.diff(snapshot_to_compare, snapshot.with_indifferent_access).any?
end

#snapshot_class ⇒ Object 



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# File 'lib/snapshotable/model.rb', line 49

def snapshot_class
  Object.const_get(snapshot_class_name)
end

#snapshots ⇒ Object 



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# File 'lib/snapshotable/model.rb', line 37

def snapshots
  send(snapshot_association_name)
end

#take_snapshot! ⇒ Object 



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# File 'lib/snapshotable/model.rb', line 32

def take_snapshot!
  snapshot = SnapshotCreator.new(self).call
  snapshot_class.create!(snapshot) if should_create_new_snapshot?(snapshot)
end