method
delete_records
v4.2.1 -
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Class: ActiveRecord::Associations::HasManyThroughAssociation
delete_records(records, method)
private
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# File activerecord/lib/active_record/associations/has_many_through_association.rb, line 153 def delete_records(records, method) ensure_not_nested scope = through_association.scope scope.where! construct_join_attributes(*records) case method when :destroy if scope.klass.primary_key count = scope.destroy_all.length else scope.each do |record| record._run_destroy_callbacks end arel = scope.arel stmt = Arel::DeleteManager.new arel.engine stmt.from scope.klass.arel_table stmt.wheres = arel.constraints count = scope.klass.connection.delete(stmt, 'SQL', scope.bind_values) end when :nullify count = scope.update_all(source_reflection.foreign_key => nil) else count = scope.delete_all end delete_through_records(records) if source_reflection.options[:counter_cache] && method != :destroy counter = source_reflection.counter_cache_column klass.decrement_counter counter, records.map(&:id) end if through_reflection.collection? && update_through_counter?(method) update_counter(-count, through_reflection) else update_counter(-count) end end