Add $where operator

src/clojure/monger/operators.clj

@@ -96,6 +96,13 @@
 (defoperator $regex)
 (defoperator $options)
 
+;; Matches documents that satisfy a JavaScript expression.
+;;
+;; EXAMPLES:
+;;
+;;   (monger.collection/find "people" { $where "this.placeOfBirth === this.address.city" })
+(defoperator $where)
+
 ;;
 ;; LOGIC OPERATORS
 ;;

test/monger/test/query_operators_test.clj

@@ -125,4 +125,10 @@
            {:language {$regex "clo.*" $options "i"}} 2
            {:name     {$regex "aK.*" $options "i"}} 1
            {:language {$regex ".*by"}} 1
-           {:language {$regex ".*ala.*"}} 1))))
+           {:language {$regex ".*ala.*"}} 1)))
+
+  (deftest find-with-js-expression
+    (let [collection "people"]
+      (mc/insert-batch db collection [{:name "Bob" :placeOfBirth "New York" :address {:city "New York"}}
+                                      {:name "Alice" :placeOfBirth "New York" :address {:city "Los Angeles"}}])
+      (is (= 1 (.count (mc/find db collection {$where "this.placeOfBirth === this.address.city"})))))))