activerecord - Select sum and dynamic where statement query in Rails 4 -


i have below statement in controller , want know how rewrite in rails 4

entry.find(:all, :conditions => [@conditions.keys.join(" , "), *@conditions.values],:group => "user_id",                                 :select => "sum(time_spent) total_spent")

the condition has user_id information in "user_id=?".

the statement trying find entry particular user id , sum time spent user id , group user id.

for example can use it

realations = entry.where(user_id: [1, 2, 3]).select("sum(time_spent) total_spent").group(:user_id)

after have relation can work

realations.each |i|   puts i.total_spent end

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