Public Instance methods
after_update()
Recalculate the column value hashes after updating.
[show source]
# File lib/sequel/plugins/modification_detection.rb 50 def after_update 51 super 52 recalculate_values_hashes 53 end
calculate_values_hashes()
Calculate the column hash values if they haven’t been already calculated.
[show source]
# File lib/sequel/plugins/modification_detection.rb 56 def calculate_values_hashes 57 @values_hashes || recalculate_values_hashes 58 end
changed_columns()
Detect which columns have been modified by comparing the cached hash value to the hash of the current value.
[show source]
# File lib/sequel/plugins/modification_detection.rb 62 def changed_columns 63 changed = super 64 if vh = @values_hashes 65 values = @values 66 changed = changed.dup if frozen? 67 vh.each do |c, v| 68 match = values.has_key?(c) && v == values[c].hash 69 if changed.include?(c) 70 changed.delete(c) if match 71 else 72 changed << c unless match 73 end 74 end 75 end 76 changed 77 end