Extend DBObject conversion protocol for more JodaTime types

ChangeLog.md

@@ -1,6 +1,12 @@
 ## Changes between 1.0.0-rc2 and 1.0.0
 
-No changes yet.
+### Extended support for BSON serialization for Joda Time types
+
+`monger.joda-time` previously only extended BSON (DBObjects) conversion protocol for `org.joda.time.DateTime`. While `DateTime` is the most
+commonly used type in JodaTime, plenty of other types are also used and may need to be stored in MongoDB documents.
+
+Now Monger handles serialization for all JodaTime types that inherit from `org.joda.time.base.AbstractInstant`, for example, `org.joda.time.DateTime`
+and `org.joda.time.DateMidnight`.
 
 
 ## Changes between 1.0.0-rc1 and 1.0.0-rc2

src/clojure/monger/joda_time.clj

@@ -19,8 +19,8 @@
 ;;
 
 (extend-protocol ConvertToDBObject
-  org.joda.time.DateTime
-  (to-db-object [^DateTime input]
+  org.joda.time.base.AbstractInstant
+  (to-db-object [^AbstractInstant input]
     (to-db-object (.toDate input))))
 
 (extend-protocol ConvertFromDBObject

test/monger/test/lib_integration_test.clj

@@ -3,7 +3,7 @@
         monger.json
         monger.joda-time
         monger.conversion)
-  (:import org.joda.time.DateTime
+  (:import [org.joda.time DateTime DateMidnight]
            org.bson.types.ObjectId
            com.mongodb.DBObject)
   (:require [clojure.data.json :as json]
@@ -23,6 +23,12 @@
     (is (= 1318550100000 (.getTime ^java.util.Date d)))))
 
 
+(deftest conversion-of-joda-datemidnight-to-db-object
+  (let [d (to-db-object (DateMidnight. (t/date-time 2011 10 13)))]
+    (is (instance? java.util.Date d))
+    (is (= 1318464000000 (.getTime ^java.util.Date d)))))
+
+
 (deftest conversion-of-java-util-date-to-joda-datetime
   (let [input  (.toDate ^DateTime (t/date-time 2011 10 13 23 55 0))
         output (from-db-object input false)]