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scalaerror-handlinglift

Scala JSON error handling and responses

I use Scala + Lift Web Framework + MongoDB for a bunch of applications. In some instances, I need to respond with a JSON error message to the client making the request to display an internationalized error message.

An error message will generally be a simple JSON:

val errorMessage = ("error" -> "some error message");

This message would then be served via net.liftweb.rest.RestHelper with yield requestParam: JValue. I use for comprehensions to check for errors and return these JValues.

What is the best practice to store these messages in Scala(with internationalization in mind)?

Solution

  • well, doesn't the principle "let the developer decide" apply? I mean, AFAIK, there is no central way to do that. Do any way you want. For example, (S ? "error") -> (S ? "my.error.reason123")