module Sequel::Plugins::ModificationDetection::InstanceMethods

Public Instance Methods

after_update() click to toggle source

Recalculate the column value hashes after updating.

Calls superclass method
# File lib/sequel/plugins/modification_detection.rb, line 45
def after_update
  super
  recalculate_values_hashes
end
calculate_values_hashes() click to toggle source

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

# File lib/sequel/plugins/modification_detection.rb, line 51
def calculate_values_hashes
  @values_hashes || recalculate_values_hashes
end
changed_columns() click to toggle source

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

Calls superclass method
# 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

Private Instance Methods

_refresh(dataset) click to toggle source

Recalculate the column value hashes after manually refreshing.

Calls superclass method
# File lib/sequel/plugins/modification_detection.rb, line 70
def _refresh(dataset)
  super
  recalculate_values_hashes
end
_save_refresh() click to toggle source

Recalculate the column value hashes after refreshing after saving a new object.

Calls superclass method
# File lib/sequel/plugins/modification_detection.rb, line 76
def _save_refresh
  super
  recalculate_values_hashes
end
recalculate_values_hashes() click to toggle source

Recalculate the column value hashes, caching them for later use.

# File lib/sequel/plugins/modification_detection.rb, line 82
def recalculate_values_hashes
  vh = {}
  @values.each do |k,v|
    vh[k] = v.hash
  end
  @values_hashes = vh.freeze
end