Play Framework - Respond with JSON after uploading a file (multipartFormData) - scala

Question

I am using this code to upload an image on server , that i get from this link play upload
def upload = Action(parse.multipartFormData) { request =>
request.body
.file("picture")
.map { picture =>
val dataParts = request.body.dataParts;
val filename = Paths.get(picture.filename).getFileName
val fileSize = picture.fileSize
val contentType = picture.contentType
val picturePaths =
picture.ref.copyTo(
Paths.get(
s"/opt/docker/images/$filename"
),
replace = true
)
if (dataParts.get("firstPoint") == None) {
val pointlocation = new Point_LocationModel(
dataParts.get("step").get(0),
dataParts.get("backgroundTargetName").get(0),
dataParts.get("x").get(0),
dataParts.get("y").get(0),
dataParts.get("z").get(0),
dataParts.get("rotation").get(0),
dataParts.get("note").get(0),
dataParts.get("tag").get(0),
dataParts.get("work_session_id").get(0),
(picturePaths).toString
)
point_LocationRepository.create(pointlocation).map { data =>
Created(Json.toJson(data._2))
}
} else {
val jValuefirstPoint =
Json.parse(dataParts.get("firstPoint").get(0)).as[PointModel]
val jValuesecondPoint =
Json.parse(dataParts.get("secondPoint").get(0)).as[PointModel]
val pointlocation = new Point_LocationModel(
dataParts.get("step").get(0),
dataParts.get("backgroundTargetName").get(0),
Some(jValuefirstPoint),
Some(jValuesecondPoint),
dataParts.get("rotation").get(0),
dataParts.get("note").get(0),
dataParts.get("tag").get(0),
dataParts.get("work_session_id").get(0),
(picturePaths).toString
)
point_LocationRepository.create(pointlocation).map { data =>
logger.info(s"repoResponse: ${data}");
Created(Json.toJson(data._2))
}
}
Ok(s"picturePaths ${picturePaths}")
}
.getOrElse(Ok("Invalid Format"))
}
This code works very well, but on the response I want to get the response from the repository. How can i await for the response of the repository to return this?
Can you give me any idea how can i do it?
Thanks in advance.

Answer 1

If we simplify your code to the essential bits, you have:
def upload = Action(parse.multipartFormData) { request =>
request.body
.file("picture")
.map { picture =>
if (someConditionA) {
someBusinessLogicA().map { data =>
Created(Json.toJson(data._2))
}
} else {
someBusinessLogicB().map { data =>
Created(Json.toJson(data._2))
}
}
Ok(s"picturePaths ${picturePaths}")
}
.getOrElse(Ok("Invalid Format"))
}
There are 2 problems:
the return of your if/else is swallowed by the Ok(s"picturePaths ${picturePaths}")
assuming your business logic returns Future[_] you need to "propagate" the Future everywhere
Something like this should work:
def upload = Action.async(parse.multipartFormData) { request =>
request.body
.file("picture")
.map { picture =>
if (someConditionA) {
someBusinessLogicA().map { data =>
Created(Json.toJson(data._2))
}
} else {
someBusinessLogicB().map { data =>
Created(Json.toJson(data._2))
}
}
}
.getOrElse(Future.successful(Ok("Invalid Format")))
}
Notice the Action.async and the Future in the getOrElse.