How to query MongoDB directly from Ruby instead of using Mongoid?

If you're using Mongoid 3, it provides easy access to its MongoDB driver: Moped. Here's an example of accessing some raw data without using Models to access the data:

db = Mongoid::Sessions.default# inserting a new documentcollection = db[:collection_name]collection.insert(name: 'my new document')# finding a documentdoc = collection.find(name: 'my new document').first# iterating over all documents in a collectioncollection.find.each do |document|  puts document.inspectend

For Mongoid 5:

db = Mongoid::Clients.defaultcollection = db[:collection_name]

Now we can perform queries on the collection

Here how you do it (This would work for 2+ and 3+ as well)

1) All your Model exhibit this behavior you have include Mongoid::Document inside all your model so technically each document is mapped in monogodb thru moped or mongodb-ruby driver via mongoid

so If you have model Like

class PerformerSource   include Mongoid::Document  ## Definitionend

Now you can run Mongo Query using the driver (Moped or Mongodb-ruby driver) like this

PerformerSource.collection.insert("something")## where something is json document you want to insert

This would give u the moped (if using mongoid 3) connection for that document

2) You can also do it something like this

 Mongoid::Sessions.default.collections.find { |document| document.name == "performer_sources"}.insert("something")

How to more on mongo query and how mongoid map those using moped u can follow this section of querying where it describe how query is acheived internally via moped

Hope this help