Iterating through every record in a database - Ruby on Rails / ActiveRecord
Here is the correct syntax to iterate over all User :
User.all.each do |user| #the code here is called once for each user # user is accessible by 'user' variable # WARNING: User.all is not performant with large datasetsendTo improve performance and decrease load, use User.find_each (see doc) instead of User.all. Note that using find_each loses the ability to sort.
Also a possible one-liner for same purpose:
User.all.map { |u| u.number = ""; puts u.number }