Monger is an idiomatic Clojure MongoDB driver for a more civilized age. It has batteries included, offers powerful expressive query DSL, strives to support every MongoDB 2.0+ feature and has sane defaults. It also has solid documentation.

1.5.0 is a minor completely backwards-compatible release that includes updated dependencies, MongoDB 2.4’s full text search support and various minor improvements.

Full Text Search Support

Full text search in MongoDB 2.4 can be used via commands but Monger 1.5 also provides convenience functions in the namespace:

  • for performing queries
  • for obtaining hit documents sorted by score
(require '[monger.collection :as mc])
(require '[     :as ms])

(mc/ensure-index coll {:subject "text" :content "text"})
(mc/insert coll {:subject "hello there" :content "this should be searchable"})
(mc/insert coll {:subject "untitled" :content "this is just noize"})

(println (ms/results-from (ms/search coll "hello"))

MongoDB Java Driver Update

MongoDB Java driver dependency has been updated to 2.11.0.

New Geospatial Operators

monger.operators now defines a few more operators for convenience:

  • $getWithin
  • $getIntersects
  • $near

Of course, these and any other new operators can be passed as strings (e.g. "$near") as well.


monger.core/admin-db is a new convenience function that returns the admin database reference.


monger.command/admin-command is a new convenience function for running commands on the admin database.

monger.core/mongo-options Updates

monger.core/mongo-options options are now up-to-date with the most recent MongoDB Java driver.

Factory DSL Is Gone

Monger’s factory DSL (an undocumented experimental feature) has been removed from monger.testkit. It did not work as well as we expected and there are better alternatives available now.

Clojure 1.5 By Default

Monger now depends on org.clojure/clojure version 1.5.1. It is still compatible with Clojure 1.3+ and if your project.clj depends on a different version, it will be used, but 1.5 is the default now.

We encourage all users to upgrade to 1.5, it is a drop-in replacement for the majority of projects out there.

Authentication On Default Database

monger.core/authenticate now has a 2-arity version that will authenticate on the default database:

(let [username "myservice"
      pwd      "LGo5h#B`cTRQ>28tba6u"]
  (monger.core/use-db! "mydb")
  ;; authenticates requests for mydb
  (monger.core/authenticate username (.toCharArray pwd)))

ClojureWerkz Support Upgrade

ClojureWerkz Support dependency has been updated to version 0.15.0. This means Monger now will use Cheshire 5.0.x.

Explicit DBCursor Closure by monger.collection/find-maps and the like

monger.collection/find-maps and the like will now explicitly close DB cursors.

GH issue: 47

Change Log

Monger change log is available on GitHub.

Monger is a ClojureWerkz Project

Monger is part of the group of libraries known as ClojureWerkz, together with

  • Welle, a Riak client with batteries included
  • Elastisch, a minimalistic Clojure client for ElasticSearch
  • Neocons, a client for the Neo4J REST API
  • Langohr, a Clojure client for RabbitMQ that embraces the AMQP 0.9.1 model
  • Quartzite, a powerful scheduling library

and several others. If you like Monger, you may also like our other projects.

Let us know what you think on Twitter or on the Clojure mailing list.

@michaelklishin on behalf of the ClojureWerkz Team