CODEWITHSUNDEEP
ruby-on-railsrubyprintinggroup-by
SJU
SJU

Reputation: 3272

RoR - print count after group_by

In my Ruby on Rails application, I want to print a count result after I grouped my records in database and I get something like that :

{1=>6}

In my database there is 6 records, all with the same user_id.

Here is my code :

Whatever.group(:user_id).count(:user_id)

I just want to print 1 how to do this. I tried with distinct and uniq without any success...

Upvotes: 0

Views: 309

Answers (2)

tadman
tadman

Reputation: 211560

If you just need to compact that down to a useful result:

Whatever.group(:user_id).count.keys.join(',')

This will handle the case where you have more than one user in the result set.

The count(:user_id) part is redundant unless you're counting based on other conditions. Just use count instead.

Upvotes: 1

Bala
Bala

Reputation: 11234

Here is an example

('a'..'b').group_by { |i| i * 2 }          #=> {"aa"=>["a"], "bb"=>["b"], "cc"=>["c"]}
('a'..'c').group_by { |i| i * 2 }.keys     #=> ["aa", "bb", "cc"]
('a'..'c').group_by { |i| i * 2 }.keys[0]  #=> "aa"

Upvotes: 0

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