I just discovered a neat method in rails called
uniq_by. ( http://apidock.com/rails/Array/uniq_by )
It allows you to get a unique set of results from an active record relation.
Ruby provides a way to get unique results from an array like so:
a = [1, 2, 3, 3, 4] a.uniq # results [1, 2, 3, 4]
But if you have an active record relation, the normal
uniq won't work.
Say you have a list of stores and you want to find their location, but
you only want 1 location from each store/company. You can use:
And that will give you a nice unique Array from an AR relation!