I would like to ask how can merge data with Mongoid, when I inserting new data class Record include Mongoid::Document include Mongoid::Attributes::Dynamic field :header1, :type => String field :header2, :type => String validates :header1, uniqueness:{scope: :header2} end Then I want to create a database from arrays of hashes record1 = [{"header4" =>"value4"}, {"header3" =>"value3"}, {"header5"=>"value5"}, {"header1"=>"value1"}, {"header2"=>"value2"}] record2 = [{"header4" =>"value4"}, {"header3" =>"value3"}, {"header5"=>"value5"}, {"header1"=>"value1"}, {"header2"=>"value2"}] all_records= [record1, record2] And I want to create new database record and if data with same keys (header1+header2) already exist I want to merge this rows all_records.each do record record.each |do| i Record.create!(i) Record.where(:header1 => i["header1"], :header2 => i["header2"] ).update(i) Record.index({ header1: 1, header2:1 }, { unique: true, drop_dups: true }) end end But when I run this code I am getting error Mongoid::Errors::Validations And looks like code record.index({ header1: 1, header:2 }, { unique: true, drop_dups: true }) does not do anything, because I still getting duplicated records in database. What is wrong with this code? Thank you for the help! -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/2fccca9675eacfe7b8f57ddcfe4726ad%40ruby-forum.com. For more options, visit https://groups.google.com/d/optout.