method

replace

v2.1.0 - Show latest stable - Class: ActiveRecord::Associations::AssociationCollection

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/association_collection.rb, line 228
      def replace(other_array)
        other_array.each { |val| raise_on_type_mismatch(val) }

        load_target
        other   = other_array.size < 100 ? other_array : other_array.to_set
        current = @target.size < 100 ? @target : @target.to_set

        @owner.transaction do
          delete(@target.select { |v| !other.include?(v) })
          concat(other_array.select { |v| !current.include?(v) })
        end
      end

replace

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