Class: ActiveRecord::AttributeMutationTracker
- Inherits:
-
Object
- Object
- ActiveRecord::AttributeMutationTracker
- Defined in:
- lib/active_record/attribute_mutation_tracker.rb
Overview
:nodoc:
Constant Summary collapse
- OPTION_NOT_GIVEN =
Object.new
Instance Method Summary collapse
- #any_changes? ⇒ Boolean
- #change_to_attribute(attr_name) ⇒ Object
- #changed?(attr_name, from: OPTION_NOT_GIVEN, to: OPTION_NOT_GIVEN) ⇒ Boolean
- #changed_attribute_names ⇒ Object
- #changed_in_place?(attr_name) ⇒ Boolean
- #changed_values ⇒ Object
- #changes ⇒ Object
- #deprecated_force_change(attr_name) ⇒ Object
- #force_change(attr_name) ⇒ Object
- #forget_change(attr_name) ⇒ Object
-
#initialize(attributes) ⇒ AttributeMutationTracker
constructor
A new instance of AttributeMutationTracker.
- #original_value(attr_name) ⇒ Object
Constructor Details
#initialize(attributes) ⇒ AttributeMutationTracker
Returns a new instance of AttributeMutationTracker.
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 5 def initialize(attributes) @attributes = attributes @forced_changes = Set.new @deprecated_forced_changes = Set.new end |
Instance Method Details
#any_changes? ⇒ Boolean
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 39 def any_changes? attr_names.any? { |attr| changed?(attr) } || deprecated_forced_changes.any? end |
#change_to_attribute(attr_name) ⇒ Object
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 32 def change_to_attribute(attr_name) attr_name = attr_name.to_s if changed?(attr_name) [attributes[attr_name].original_value, attributes.fetch_value(attr_name)] end end |
#changed?(attr_name, from: OPTION_NOT_GIVEN, to: OPTION_NOT_GIVEN) ⇒ Boolean
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 43 def changed?(attr_name, from: OPTION_NOT_GIVEN, to: OPTION_NOT_GIVEN) attr_name = attr_name.to_s forced_changes.include?(attr_name) || attributes[attr_name].changed? && (OPTION_NOT_GIVEN == from || attributes[attr_name].original_value == from) && (OPTION_NOT_GIVEN == to || attributes[attr_name].value == to) end |
#changed_attribute_names ⇒ Object
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 11 def changed_attribute_names attr_names.select { |attr_name| changed?(attr_name) } end |
#changed_in_place?(attr_name) ⇒ Boolean
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 51 def changed_in_place?(attr_name) attributes[attr_name.to_s].changed_in_place? end |
#changed_values ⇒ Object
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 15 def changed_values attr_names.each_with_object({}.with_indifferent_access) do |attr_name, result| if changed?(attr_name) result[attr_name] = attributes[attr_name].original_value end end end |
#changes ⇒ Object
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 23 def changes attr_names.each_with_object({}.with_indifferent_access) do |attr_name, result| change = change_to_attribute(attr_name) if change result.merge!(attr_name => change) end end end |
#deprecated_force_change(attr_name) ⇒ Object
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 69 def deprecated_force_change(attr_name) deprecated_forced_changes << attr_name.to_s end |
#force_change(attr_name) ⇒ Object
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 65 def force_change(attr_name) forced_changes << attr_name.to_s end |
#forget_change(attr_name) ⇒ Object
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 55 def forget_change(attr_name) attr_name = attr_name.to_s attributes[attr_name] = attributes[attr_name].forgetting_assignment forced_changes.delete(attr_name) end |
#original_value(attr_name) ⇒ Object
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# File 'lib/active_record/attribute_mutation_tracker.rb', line 61 def original_value(attr_name) attributes[attr_name.to_s].original_value end |