Get succeeding object in cycled collection

Question

I have a collection of users which is ordered by their last name.

User.order(last_name: :asc)

I want to get the user suceeding another one (stored in variable), and if last in collection get the first.

Any better solutions to this than what I've done?

user # stored user object
users = User.order(last_name: :asc)
index = users.index {|item| item == user}
succeeding = if user == users[index].last then users[index].first else users[index + 1] end

http://stackoverflow.com/a/25674239/2076787 Look at this. With sorting first by last name and then by id this is pretty much it. The rest is provided in an already given answer. — D-side, Sep 05 '14 at 15:11

Jaugar Chang · Accepted Answer · 2014-09-05T13:03:32.320

0

user # stored user object
users = User.order(last_name: :asc)

succeeding = users[users.find_index(user)+1]||users.first

edited Sep 05 '14 at 13:03

answered Sep 05 '14 at 12:53

Jaugar Chang

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Get succeeding object in cycled collection

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