method
decrement_counters_before_last_save
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Class: ActiveRecord::Associations::BelongsToAssociation
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decrement_counters_before_last_save()
public
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# File activerecord/lib/active_record/associations/belongs_to_association.rb, line 45 def decrement_counters_before_last_save if reflection.polymorphic? model_was = owner.attribute_before_last_save(reflection.foreign_type).try(:constantize) else model_was = klass end foreign_key_was = owner.attribute_before_last_save(reflection.foreign_key) if foreign_key_was && model_was < ActiveRecord::Base update_counters_via_scope(model_was, foreign_key_was, -1) end end