Mongoid batch collection insert: how to get the ids of the newly created items?

Question

As explained here, it's fairly easy to batch insert an array of new documents into a MongoDB collection:

batch = [{:name => "mongodb"}, {:name => "mongoid"}]  
Article.collection.insert(batch)

What I don't find easy though is how to retrieve the list of newly created ids. Is it possible to code something like:

batch = [{:name => "mongodb"}, {:name => "mongoid"}]
result = Article.collection.insert(batch)

result[:ids] # not real code

Thanks in advance!

Answer 1

You can now access this data with inserted_ids https://www.mongodb.com/docs/ruby-driver/master/api/Mongo/BulkWrite/Result.html so for your example it would be

batch = [{:name => "mongodb"}, {:name => "mongoid"}]
result = Article.collection.insert_many(batch)

result.inserted_ids