instance method
find_nth_from_last
Ruby on Rails 5.0.7.2
Since v5.0.7.2Signature
find_nth_from_last(index)No documentation comment.
Parameters
-
indexreq
Source
# File activerecord/lib/active_record/relation/finder_methods.rb, line 566
def find_nth_from_last(index)
if loaded?
records[-index]
else
relation = if order_values.empty? && primary_key
order(arel_attribute(primary_key).asc)
else
self
end
relation.to_a[-index]
# TODO: can be made more performant on large result sets by
# for instance, last(index)[-index] (which would require
# refactoring the last(n) finder method to make test suite pass),
# or by using a combination of reverse_order, limit, and offset,
# e.g., reverse_order.offset(index-1).first
end
end
Defined in activerecord/lib/active_record/relation/finder_methods.rb line 566
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Defined in ActiveRecord::FinderMethods