Counting and grouping at the same time

Question

I have a Mail model with the following schema:

t.string   \"mail\"
t.integer  \"country\"
t.boolean  \"validated\"
t.datetime \"created_at\"
t.d         


        

Answer 1

Mail.find(
    :all, 
    :select => 'count(*) count, country', 
    :group => 'country', 
    :conditions => ['validated = ?', 't' ], 
    :order => 'count DESC',
    :limit => 5)

This should give you records that have a country attribute and a count attribute.