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Module: ActiveRecord::CounterCache

Relationships & Source Files
Namespace Children
Modules:
ClassMethods
Extension / Inclusion / Inheritance Descendants
Included In:
Base
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveSupport::Concern
Defined in: activerecord/lib/active_record/counter_cache.rb

Class Method Summary

::ActiveSupport::Concern - Extended

class_methods

Define class methods from given block.
included

Evaluate given block in context of base class, so that you can write class macros here.
prepended

Evaluate given block in context of base class, so that you can write class macros here.
append_features, prepend_features

Instance Method Summary

DSL Calls

included

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# File 'activerecord/lib/active_record/counter_cache.rb', line 8

included do
  class_attribute :_counter_cache_columns, instance_accessor: false, default: []
  class_attribute :counter_cached_association_names, instance_writer: false, default: []
end

Instance Method Details

#_create_record(attribute_names = self.attribute_names) (private)

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# File 'activerecord/lib/active_record/counter_cache.rb', line 200



def _create_record(attribute_names = self.attribute_names)
  id = super

  counter_cached_association_names.each do |association_name|
    association(association_name).increment_counters
  end

  id
end


  








  

    #_foreign_keys_equal?(fkey1, fkey2)  ⇒ Boolean  (private)
  



  

    
  





  


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# File 'activerecord/lib/active_record/counter_cache.rb', line 226



def _foreign_keys_equal?(fkey1, fkey2)
  fkey1 == fkey2 || Array(fkey1).map(&:to_sym) == Array(fkey2).map(&:to_sym)
end


  








  

    #destroy_row   (private)
  

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# File 'activerecord/lib/active_record/counter_cache.rb', line 210



def destroy_row
  affected_rows = super

  if affected_rows > 0
    counter_cached_association_names.each do |association_name|
      association = association(association_name)

      unless destroyed_by_association && _foreign_keys_equal?(destroyed_by_association.foreign_key, association.reflection.foreign_key)
        association.decrement_counters
      end
    end
  end

  affected_rows
end