If you have your validations set, you can use something like in User model: scope :without_username, where(:username => nil) validates :username, :uniqueness => true, :presence => false
and then use users = User.without_username users.each do |user| username = user.email.split(/@/).first user.username = username while !user.valid? user.username+=rand(10).to_s end user.save end tom On Jul 9, 2012, at 15:01 , regedarek wrote: > I would like to create rake task to set the username of all users' without a > username to the part before the '@' in their email address. So if my email is > [email protected], my username should become test. If it's not available, prepend > it by a number (1). > > So i have problem witch checking uniqness of username. Code below isn`t > working after second loop ex: when i have three emails: [email protected], > [email protected], [email protected] username for [email protected] will be empty. > > I have of course uniqness validation for username in User model. > > desc "Set username of all users wihout a username" > task set_username_of_all_users: :environment do > users_without_username = User.select{ |u| !u.username? } > users_without_username.each do |user| > username = user.email.split('@').first > if User.find_by_username(username).blank? > user.username = username > user.save > else > User.find_by_username(username).each_with_index do |u, index| > u.username = username.insert(0, index) > u.save > end > end > end > end > > Other ideas are in Gist: https://gist.github.com/3067635#comments > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/rubyonrails-talk/-/4tkg3bBKTbcJ. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en-US. -- =============================================================================== Tomas Meinlschmidt, MS {MCT, MCP+I, MCSE, AER}, NetApp Filer/NetCache www.meinlschmidt.com www.maxwellrender.cz www.lightgems.cz =============================================================================== -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en-US.
