method

size

v4.2.9 - Show latest stable - Class: ActiveRecord::Associations::HasManyThroughAssociation

size()

public

Returns the size of the collection by executing a SELECT COUNT(*) query if the collection hasn’t been loaded, and by calling collection.size if it has. If the collection will likely have a size greater than zero, and if fetching the collection will be needed afterwards, one less SELECT query will be generated by using #length instead.

# File activerecord/lib/active_record/associations/has_many_through_association.rb, line 21
      def size
        if has_cached_counter?
          owner._read_attribute cached_counter_attribute_name(reflection)
        elsif loaded?
          target.size
        else
          super
        end
      end

size

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