Rails Sort Array By Two Columns [duplicate]

Question

Let's say I have an array called surveys that's made up of Survey.all

Each survey model has a length and cost columns.

What's the best way to sort an array first on length, and then on cost.

I basically want to do something similar to Survey.all.order(length: :desc, cost: :asc) but on the array after it's created.

How to sort a ruby array by two conditions would be another duplicate. — mu is too short
– mu is too short, Commented Mar 31, 2017 at 2:18

Glorfindel · Accepted Answer · 2022-06-22 08:01:35Z

3

Use sort_by:

surveys.sort_by { |survey| [survey.length, survey.cost] }

If you want to control asc vs desc, just multiply by -1:

surveys.sort_by { |survey| [-1 * survey.length, survey.cost] }

This should work for both regular array of objects or ActiveRecord::Relation

edited Jun 22, 2022 at 8:01

Glorfindel

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answered Mar 31, 2017 at 0:39

Raj

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3 Comments

TAH Over a year ago

will that work just on the surveys array? At this point in time I will just have access to the array rather than the Survey.all (i.e. I'm not actually using Survey.all to get my array of surveys but it was easier to type)

Raj Over a year ago

should work, try and let me know

court3nay Over a year ago

can also use -survey.length for desc.

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