Leveraging Ajax with PlayFramework Results

As stated in the PlayFramework Document 2.0 and PlayFramework Document 2.1, it is known that Play can return various responses such as:

Ok()
badRequest()
created()
status()
forbidden()
internalServerError()
TODO

However, when trying to send a response with additional information using ajax, Play only sends status information along with some mysterious object. Only the ok("Test message") method successfully includes both status and custom message. How can this issue be addressed?

-- Edit --

An example of an ajax method being used:

$.post($("#assignmentsubmitAddress").text(), { 'units' : submittedUnits },
  function(response, status, xhr) {
    showNotification(status, response);
  })

When using return ok("test"); in the Java script, the variable response contains the string "test". However, if return badRequest("test"); is used, the response variable holds a Java object instead and printing it results in displaying Object object.

javajavascriptajaxplayframework

Answer №1

In order to send a response in JSON format back to your client, you can use the following code snippet:

/**
 * Convert a JSON object into a JSON string.
 */
public static<T> String objectToJson(Object obj)
{
    ObjectMapper mapper = new ObjectMapper();
    try{
        String json = mapper.writeValueAsString(obj);
        return json;
    }catch(java.io.IOException e){
        Logger.error(e.getMessage(), e);
    }
    return "";
}

public static Result actions()
{
    Object objectToSendBack = ...
    return ok(objectToJson(objectToSendBack));
}

You have the flexibility to send back any type of content, including HTML, but using JSON is often more practical for interacting with JavaScript functions.

Answer №2

I finally solved it!

All I needed to do was modify the variable response, which is an object, to response.responseText.

And voila, it's working perfectly now.

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