method

fetch_first_or_last_using_find?

v3.2.1 - Show latest stable - 0 notes - Class: CollectionAssociation

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What's this?

fetch_first_or_last_using_find?(args) private

Should we deal with assoc.first or assoc.last by issuing an independent query to the database, or by getting the target, and then taking the first/last item from that?

If the args is just a non-empty options hash, go to the database.

Otherwise, go to the database only if none of the following are true:

* target already loaded
* owner is new record
* custom :finder_sql exists
* target contains new or changed record(s)
* the first arg is an integer (which indicates the number of records to be returned)

Show source

# File activerecord/lib/active_record/associations/collection_association.rb, line 528
        def fetch_first_or_last_using_find?(args)
          if args.first.is_a?(Hash)
            true
          else
            !(loaded? ||
              owner.new_record? ||
              options[:finder_sql] ||
              target.any? { |record| record.new_record? || record.changed? } ||
              args.first.kind_of?(Integer))
          end
        end

fetch_first_or_last_using_find?

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