method

replace

rails latest stable - Class: ActiveRecord::Associations::CollectionAssociation

replace(other_array)

public

Replace this collection with other_array. This will perform a diff and delete/add only records that have changed.

# File activerecord/lib/active_record/associations/collection_association.rb, line 240
      def replace(other_array)
        other_array.each { |val| raise_on_type_mismatch!(val) }
        original_target = skip_strict_loading { load_target }.dup

        if owner.new_record?
          replace_records(other_array, original_target)
        else
          replace_common_records_in_memory(other_array, original_target)
          if other_array != original_target
            transaction { replace_records(other_array, original_target) }
          else
            other_array
          end
        end
      end

replace

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