Module: GuardAgainstPhysicalDelete::SupportCounterCache::Associations::Builder::BelongsTo

Defined in:
lib/guard_against_physical_delete/support_counter_cache/associations/builder/belongs_to.rb

Class Method Summary collapse

Class Method Details

.included(obj) ⇒ Object 



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# File 'lib/guard_against_physical_delete/support_counter_cache/associations/builder/belongs_to.rb', line 6

def self.included(obj)
  class << obj
    prepend MethodOverrides

    private

    def add_logical_delete_counter_cache_methods(mixin)
      mixin.class_eval do
        def belongs_to_counter_cache_after_logical_delete(reflection)
          cache_column = reflection.counter_cache_column
          delete_column = self.logical_delete_column
          return unless saved_change_to_logical_delete_column?(delete_column)
          return unless logical_delete_column_before_last_save(delete_column).nil?

          record = send(reflection.name)
          record.class.decrement_counter(cache_column, record.id) unless record.nil?
        end

        def belongs_to_counter_cache_after_revive(reflection)
          cache_column = reflection.counter_cache_column
          delete_column = self.logical_delete_column
          return unless saved_change_to_logical_delete_column?(delete_column)
          return if logical_delete_column_before_last_save(delete_column).nil?
          return unless send(delete_column).nil?
          record = send(reflection.name)
          record.class.increment_counter(cache_column, record.id) unless record.nil?
        end

        if ActiveRecord.version < Gem::Version.new('5.1.0')
          def saved_change_to_logical_delete_column?(delete_column)
            __send__("#{delete_column}_changed?")
          end

          def logical_delete_column_before_last_save(delete_column)
            __send__("#{delete_column}_was")
          end
        else
          def saved_change_to_logical_delete_column?(delete_column)
            __send__("saved_change_to_#{delete_column}?")
          end

          def logical_delete_column_before_last_save(delete_column)
            __send__("#{delete_column}_before_last_save")
          end
        end
      end

      mixin.redefine_method("belongs_to_counter_cache_after_update_for_#{name}") do
        # do nothing
      end if mixin.method_defined?("belongs_to_counter_cache_after_update_for_#{name}")
    end
  end
end