method

ids_writer

v5.0.0.1 - Show latest stable - 1 note - Class: CollectionAssociation

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What's this?

ids_writer(ids) public

Implements the ids writer method, e.g. foo.item_ids= for Foo.has_many :items

# File activerecord/lib/active_record/associations/collection_association.rb, line 71
      def ids_writer(ids)
        pk_type = reflection.primary_key_type
        ids = Array(ids).reject(&:blank?)
        ids.map! { |i| pk_type.cast(i) }
        records = klass.where(reflection.association_primary_key => ids).index_by do |r|
          r.send(reflection.association_primary_key)
        end.values_at(*ids)
        replace(records)
      end

September 17, 2011

0 thanks

this works, but doesn't make sense

does it?

replace(klass.find(ids).index_by { |r| r.id }.values_at(*ids))

equals

replace(klass.find(ids))

I see no point in making it that complicated

ids_writer

Related methods

this works, but doesn't make sense