Parsing JSON Date Time in Scala/Play

Question

I have the following Read defined:

import org.joda.time.DateTime;

implicit val userInfoRead: Reads[UserInfo] = (
  (JsPath \ "userName").readNullable[String] and
] (JsPath \ "startDate").readNullable[DateTime]
 (UserInfo.apply _)

With the following JSON object being passed in:

  "userInfo" : {
    "userName": "joeuser",
    "startDate": "2006-02-28"
  }

When I validate this data I get the following error:

(/startDate,List(ValidationError(validate.error.expected.jodadate.format,WrappedArray(yyyy-MM-dd))))))

Any suggestions on what I'm missing in the formatting?

there's a free `]` on the 5th line of your first code bit, is that supposed to be there? — Electric Coffee, Oct 15 '14 at 16:58
It was a copy/paste error in the sample code here, not in the program code. — ccudmore, Oct 18 '14 at 01:04

score 4 · Answer 1 · answered Oct 15 '14 at 17:56

4

As far as I can see, the issue is probably just the format not matching what Joda is expecting. I simplified a bit, and this worked for me:

scala> import org.joda.time.DateTime
import org.joda.time.DateTime

scala> case class UserInfo(userName: String, startDate: DateTime)
defined class UserInfo

scala> implicit val dateReads = Reads.jodaDateReads("yyyy-MM-dd")
dateReads: play.api.libs.json.Reads[org.joda.time.DateTime] = play.api.libs.json.DefaultReads$$anon$10@22db02cb

scala> implicit val userInfoReads = Json.reads[UserInfo]
userInfoReads: play.api.libs.json.Reads[UserInfo] = play.api.libs.json.Reads$$anon$8@52bcbd5d

scala> val json = Json.parse("""{
     |     "userName": "joeuser",
     |     "startDate": "2006-02-28"
     |   }""")
json: play.api.libs.json.JsValue = {"userName":"joeuser","startDate":"2006-02-28"}

scala> json.validate[UserInfo]
res12: play.api.libs.json.JsResult[UserInfo] = JsSuccess(UserInfo(joeuser,2006-02-28T00:00:00.000-05:00),)

answered Oct 15 '14 at 17:56

acjay

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Thanks. I tried your exact code and got the exact same error message that I received with my code. Wondering if there's a bug in the version of Scala I'm using?? – ccudmore Oct 15 '14 at 19:40
@user2639243 What version are you using? – acjay Oct 15 '14 at 21:45
Using Scala 2.10.0, part of play 2.1.4. – ccudmore Oct 16 '14 at 23:48
I see. I take it upgrading isn't a viable option? – acjay Oct 17 '14 at 00:11
Correct, no upgrade possible – ccudmore Oct 18 '14 at 01:03

Parsing JSON Date Time in Scala/Play

1 Answers1