Rails 3, ActiveRecord, PostgreSQL - “.uniq” command doesn't work?

Question

I have following query:

Article.joins(:themes => [:users]).where([\"articles.user_id != ?\", current_user.id]).order(\"Random()\").limit(15).uniq
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Answer 1

Just to enrich the thread with more examples, in case you have nested relations in the query, you can try with the following statement.

Person.find(params[:id]).cars.select('cars.*, lower(cars.name)').order("lower(cars.name) ASC")

In the given example, you're asking all the cars for a given person, ordered by model name (Audi, Ferrari, Porsche)

I don't think this is a better way, but may help to address this kind of situation thinking in objects and collections, instead of a relational (Database) way.

Thanks!