Is it possible to return a hash with named keys from an ActiveRecord group query?

Question

The following query works as expected:

Purchase.all.group( :user_id ).sum( :price )

It returns an array of hashes:

[{ 1 : 234 }, ...

Is there a way to return an array of hashes with keys ?

[{ id : 1, price : 234 }, ...

+3

ruby-on-rails activerecord ruby-on-rails-4

B Seven 13 jul. 15 at 19:21

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2 answers

I believe this will do:

Purchase.all.group(:user_id).sum(:price).map do |k, v| 
  {
    id: k.keys.pop, 
    price: k.values.pop
  }
end

Although a little hacky, it works.

0

MurifoX 13 jul. 15 at 19:27

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Erick eduardo garcia · Accepted Answer · 2015-07-13T20:42:41+0000

You can return ActiveRecord :: Relation with a single request.

Purchase.select("user_id as id, sum(price) as price").group("user_id")