ruby iterate through sql results -

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i need iterate through records found sql , update them all.

i need update couple of thousand records , requirements complex enough search records sql. code below works there way of doing without performing several thousand update statements?

users = user.find_by_sql "select e.id users e inner join accounts on a.id = e.account_id e.account_id not in (1955,3083, 3869)" users.each |user|   u = user.find(user.id)   if u     u.update_attribute(:last_name, 'x')   end end

this same thing code, single update: 

user.joins(:accounts)   .where("users.account_id not in (?)", [1955, 3083, 3869])   .update_all(last_name: "x")

you can find documentation update_all here.


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