Ruby mongo - array映射添加另一个字段

require 'mongo'

# 连接到MongoDB数据库
client = Mongo::Client.new('mongodb://localhost:27017/mydb')
collection = client[:mycollection]

# 查询需要进行映射的文档
documents = collection.find({})

# 对数组进行映射并添加另一个字段
mapped_documents = documents.map do |doc|
  new_field_value = doc['array'].map { |item| item + ' new field' }
  doc.merge('new_field' => new_field_value)
end

# 更新映射后的文档到数据库
mapped_documents.each do |mapped_doc|
  collection.update_one({ '_id' => mapped_doc['_id'] }, '$set' => { 'new_field' => mapped_doc['new_field'] })
end