    # Returns true if relation needs eager loading.
    def eager_loading?
      @should_eager_load ||=
        eager_load_values.any? ||
        includes_values.any? && (joined_includes_values.any? || references_eager_loaded_tables?)
    end
…
    def preload_associations(records) # :nodoc:
      preload = preload_values
      preload += includes_values unless eager_loading?
      scope = strict_loading_value ? StrictLoadingScope : nil
      preload.each do |associations|
        ActiveRecord::Associations::Preloader.new(records: records, associations: associations, scope: scope).call
      end
    end
…
      def exec_main_query(async: false)
        if @none
          if async
            return FutureResult.wrap([])
          else
            return []
          end
        end

        skip_query_cache_if_necessary do
          if where_clause.contradiction?
            [].freeze
          elsif eager_loading?
            model.with_connection do |c|
              apply_join_dependency do |relation, join_dependency|
                if relation.null_relation?
                  [].freeze
                else
                  relation = join_dependency.apply_column_aliases(relation)
                  @_join_dependency = join_dependency
                  c.select_all(relation.arel, "#{model.name} Eager Load", async: async)
                end
              end
            end
          else
            model.with_connection do |c|
              model._query_by_sql(c, arel, async: async)
            end
          end
        end
      end

Échauffement