SALT-821: Migrate "ConversationElements::Feedback" to "ConversationElements::Plaintext"

migrate.rb

@count = Conversation.where("conversation_groups.conversation_elements._type" => "ConversationElements::Feedback").count
Conversation.where("conversation_groups.conversation_elements._type" => "ConversationElements::Feedback").each_with_index do |conversation, i|
  percentage = (i.to_f / @count) * 100
  puts "PROGRESS: #{percentage.to_s}" if percentage % 10 == 0
  for group in conversation.conversation_groups do
    for element in group.conversation_elements do
      if element._type == "ConversationElements::Feedback"
        text = element.text
        group.conversation_elements << ConversationElements::Plaintext.new(text: text)
        element.delete
      end
    end
  end
end

For

Conversation.where("conversation_groups.conversation_elements._type" => "ConversationElements::Feedback").count

there are 198 on staging and 2185 on production.

there has to be a better way to do this...

apparently not after looking through MondoDB documentation

Yeah, there is no better way, unfortunately :)
If we would prepare this code to run in a continuous mode, I'd try to find a way to improve it (like iterators instead of for loops or remove a where condition, which will return 99.99% of all conversations anyway, but at the same time consumes some time to calculate), or even rewrite it to two more idiomatic mongo queries, but for our purpose it totally fine.