```ruby

namespace :data do
  task :run => [:clean,
                :rename]

  task :clean => ["db:mongoid:remove_undefined_indexes", "db:mongoid:create_indexes"]

  task :rename => :environment do
    Entry.all.rename(:word_id => :wordset_id)
    Proposal.all.rename(:word_id => :wordset_id)
    Seq.all.rename(:word_id => :wordset_id)
    Proposal.where(_type: "ProposeNewWord").update_all(_type: "ProposeNewWordset")
  end

end
```

Rename rake task should assign language to all wordsets
user
```ruby

namespace :data do
  task :run => [:clean,
                :rename]

  task :clean => ["db:mongoid:remove_undefined_indexes", "db:mongoid:create_indexes"]

  task :rename => :environment do
    Entry.all.rename(:word_id => :wordset_id)
    Proposal.all.rename(:word_id => :wordset_id)
    Seq.all.rename(:word_id => :wordset_id)
    Proposal.where(_type: "ProposeNewWord").update_all(_type: "ProposeNewWordset")
    Wordset.update_all(lang_id: Lang.first.id)
  end

end
```
assistant