find_with_associations

# File activerecord/lib/active_record/relation/finder_methods.rb, line 366
    def find_with_associations
      # NOTE: the JoinDependency constructed here needs to know about
      #       any joins already present in `self`, so pass them in
      #
      # failing to do so means that in cases like activerecord/test/cases/associations/inner_join_association_test.rb:136
      # incorrect SQL is generated. In that case, the join dependency for
      # SpecialCategorizations is constructed without knowledge of the
      # preexisting join in joins_values to categorizations (by way of
      # the `has_many :through` for categories).
      #
      join_dependency = construct_join_dependency(joins_values)

      aliases  = join_dependency.aliases
      relation = select aliases.columns
      relation = apply_join_dependency(relation, join_dependency)

      if block_given?
        yield relation
      else
        if ActiveRecord::NullRelation === relation
          []
        else
          arel = relation.arel
          rows = connection.select_all(arel, 'SQL', relation.bound_attributes)
          join_dependency.instantiate(rows, aliases)
        end
      end
    end