Flowdock
method

associated_records_by_owner

Importance_0
v4.1.8 - Show latest stable - 0 notes - Class: Association
associated_records_by_owner(preloader) private

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# File activerecord/lib/active_record/associations/preloader/association.rb, line 77
        def associated_records_by_owner(preloader)
          owners_map = owners_by_key
          owner_keys = owners_map.keys.compact

          # Each record may have multiple owners, and vice-versa
          records_by_owner = owners.each_with_object({}) do |owner,h|
            h[owner] = []
          end

          if owner_keys.any?
            # Some databases impose a limit on the number of ids in a list (in Oracle it's 1000)
            # Make several smaller queries if necessary or make one query if the adapter supports it
            sliced  = owner_keys.each_slice(klass.connection.in_clause_length || owner_keys.size)

            records = load_slices sliced
            records.each do |record, owner_key|
              owners_map[owner_key].each do |owner|
                records_by_owner[owner] << record
              end
            end
          end

          records_by_owner
        end
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