Module: Sequel::Plugins::ModificationDetection::InstanceMethods

Defined in:
lib/sequel/plugins/modification_detection.rb

Instance Method Summary collapse

Instance Method Details

#after_update ⇒ Object

Recalculate the column value hashes after updating.



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# File 'lib/sequel/plugins/modification_detection.rb', line 45

def after_update
  super
  recalculate_values_hashes
end

#calculate_values_hashes ⇒ Object

Calculate the column hash values if they haven’t been already calculated.



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# File 'lib/sequel/plugins/modification_detection.rb', line 51

def calculate_values_hashes
  @values_hashes || recalculate_values_hashes
end

#changed_columns ⇒ Object

Detect which columns have been modified by comparing the cached hash value to the hash of the current value.



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# File 'lib/sequel/plugins/modification_detection.rb', line 57

def changed_columns
  cc = super
  changed = []
  v = @values
  if vh = @values_hashes
    (vh.keys - cc).each{|c| changed << c unless v.has_key?(c) && vh[c] == v[c].hash}
  end
  cc + changed
end