Public Instance methods
after_update()
Recalculate the column value hashes after updating.
[show source]
# File lib/sequel/plugins/modification_detection.rb 48 def after_update 49 super 50 recalculate_values_hashes 51 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 54 def calculate_values_hashes 55 @values_hashes || recalculate_values_hashes 56 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 60 def changed_columns 61 changed = super 62 if vh = @values_hashes 63 values = @values 64 changed = changed.dup if frozen? 65 vh.each do |c, v| 66 match = values.has_key?(c) && v == values[c].hash 67 if changed.include?(c) 68 changed.delete(c) if match 69 else 70 changed << c unless match 71 end 72 end 73 end 74 changed 75 end