Add $eq operator

src/clojure/monger/operators.clj

@@ -80,6 +80,12 @@
 ;;   (mgcol/find-maps "languages" { :tags { $nin [ "functional" ] } } )
 (defoperator $nin)
 
+;; $eq is "equals" comparator
+;;
+;; EXAMPLES:
+;;   (monger.collection/find "libraries" { :language { $eq "Clojure" }})
+(defoperator $eq)
+
 ;; $ne is "non-equals" comparator
 ;;
 ;; EXAMPLES:

test/monger/test/query_operators_test.clj

@@ -54,6 +54,18 @@
            2 {:users {$lte 5}}
            1 {:users {$gt 10 $lt 150}})))
 
+  ;;
+  ;; $eq
+  ;;
+
+  (deftest find-with-eq-operator
+    (let [collection "libraries"]
+      (mc/insert-batch db collection [{:language "Ruby"    :name "mongoid"  :users 1 :displayName nil}
+                                      {:language "Clojure" :name "langohr"  :users 5}
+                                      {:language "Clojure" :name "incanter" :users 15}
+                                      {:language "Scala"   :name "akka"     :users 150}])
+      (is (= 2 (.count (mc/find db collection {:language {$eq "Clojure"}}))))))
+
   ;;
   ;; $ne
   ;;