module Sequel::Plugins::ModificationDetection::InstanceMethods
Public Instance Methods
after_update()
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Recalculate the column value hashes after updating.
Calls superclass method
# File lib/sequel/plugins/modification_detection.rb 48 def after_update 49 super 50 recalculate_values_hashes 51 end
calculate_values_hashes()
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Calculate the column hash values if they haven't been already calculated.
# File lib/sequel/plugins/modification_detection.rb 54 def calculate_values_hashes 55 @values_hashes || recalculate_values_hashes 56 end
changed_columns()
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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 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
Private Instance Methods
_refresh(dataset)
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Recalculate the column value hashes after manually refreshing.
Calls superclass method
# File lib/sequel/plugins/modification_detection.rb 80 def _refresh(dataset) 81 super 82 recalculate_values_hashes 83 end
_save_refresh()
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Recalculate the column value hashes after refreshing after saving a new object.
Calls superclass method
# File lib/sequel/plugins/modification_detection.rb 86 def _save_refresh 87 super 88 recalculate_values_hashes 89 end
recalculate_values_hashes()
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Recalculate the column value hashes, caching them for later use.
# File lib/sequel/plugins/modification_detection.rb 92 def recalculate_values_hashes 93 vh = {} 94 @values.each do |k,v| 95 vh[k] = v.hash 96 end 97 @values_hashes = vh.freeze 98 end