def create_multiple(documents = [], options = {}, &block)
  docs = []
  documents.each do |doc|
    create(doc, options, &block)
  end
  docs
end


Post.create_multiple([
  { 
    title: 'Just another posts',
    body : 'Lorem ipsum dolor sit ame'
  },
  {
    title: 'Just another posts MONGOID-5',
    body : 'I want to tell you a story...'
  }])