Class: ActiveRecord::AttributeMutationTracker

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/attribute_mutation_tracker.rb

Overview

:nodoc:

Instance Method Summary collapse

Constructor Details

#initialize(attributes) ⇒ AttributeMutationTracker

Returns a new instance of AttributeMutationTracker.



3
4
5
 
# File 'lib/active_record/attribute_mutation_tracker.rb', line 3

def initialize(attributes)
  @attributes = attributes
end

Instance Method Details

#changed?(attr_name) ⇒ Boolean

Returns:

  • (Boolean) 


23
24
25
26
 
# File 'lib/active_record/attribute_mutation_tracker.rb', line 23

def changed?(attr_name)
  attr_name = attr_name.to_s
  attributes[attr_name].changed?
end

#changed_in_place?(attr_name) ⇒ Boolean

Returns:

  • (Boolean) 


28
29
30
 
# File 'lib/active_record/attribute_mutation_tracker.rb', line 28

def changed_in_place?(attr_name)
  attributes[attr_name].changed_in_place?
end

#changed_values ⇒ Object 



7
8
9
10
11
12
13
 
# File 'lib/active_record/attribute_mutation_tracker.rb', line 7

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 



15
16
17
18
19
20
21
 
# File 'lib/active_record/attribute_mutation_tracker.rb', line 15

def changes
  attr_names.each_with_object({}.with_indifferent_access) do |attr_name, result|
    if changed?(attr_name)
      result[attr_name] = [attributes[attr_name].original_value, attributes.fetch_value(attr_name)]
    end
  end
end

#forget_change(attr_name) ⇒ Object 



32
33
34
35
 
# File 'lib/active_record/attribute_mutation_tracker.rb', line 32

def forget_change(attr_name)
  attr_name = attr_name.to_s
  attributes[attr_name] = attributes[attr_name].forgetting_assignment
end