method

preload_one

v3.1.0 - Show latest stable - 0 notes - Class: Preloader

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What's this?

preload_one(association) private

Not all records have the same class, so group then preload group on the reflection itself so that if various subclass share the same association then we do not split them unnecessarily

Additionally, polymorphic belongs_to associations can have multiple associated classes, depending on the polymorphic_type field. So we group by the classes as well.

Show source

# File activerecord/lib/active_record/associations/preloader.rb, line 125
      def preload_one(association)
        grouped_records(association).each do |reflection, klasses|
          klasses.each do |klass, records|
            preloader_for(reflection).new(klass, records, reflection, options).run
          end
        end
      end

preload_one

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