Assistance with JSON response

[MrPapayaMan]

Hi

Having some issues with JSON using Google Translate API. Not sure where my error is. Would anyone be able to advise?

Here is the response text

{
“data”: {
“translations”: [
{
“translatedText”: “vamos a la tienda”,
“model”: “nmt”
}
]
}
}

Receiving a null reference at line 7

Debug.Log("Received: " + www.downloadHandler.text);
                //TranslationResponse translationResponse = JsonConvert.DeserializeObject<TranslationResponse>(www.downloadHandler.text);
                translationResponse = JsonConvert.DeserializeObject<TranslationResponse>(www.downloadHandler.text);
                Debug.Log(translationResponse);
                Debug.Log(translationResponse.TranslationData); // Error here TranslationData is null
                OnTranslated(translationResponse.TranslationData.Translations[0].TranslatedText);

public class TranslationResponse
{
    public TranslationData TranslationData;
}

public class TranslationData
{
    public List<Translation> Translations;
}

public class Translation
{
    public string TranslatedText;
    public string Model;
}

[Kurt-Dekker]

How to fix a NullReferenceException error

https://forum.unity.com/threads/how-to-fix-a-nullreferenceexception-error.1230297/

Three steps to success:

• Identify what is null
• Identify why it is null
• Fix that

Networking, UnityWebRequest, WWW, Postman, curl, WebAPI, etc:

Using Unity for subscription lists

As with all network code, get it working with Postman or curl first. That makes it NOT a Unity problem. Solve the networking first. You must solve that or anything else is irrelevant. Once you have that working, then try and port it to UnityWebRequest. If it still doesn't work, one handy debug solution is to hook up a proxy like Charles and compare the functioning output from Postman / curl to the output from Unity, and from that reason about where your issues are.

Unity web request acting stupid.

Always get network stuff working outside of Unity in either curl or PostMan, then connect a proxy such as Charles and start trying to replicate the traffic shape with UnityWebRequest. Any other way risks wasting a lot of your time for trivial issues that only the above way will instantly reveal.

And setting up a proxy can be very helpful too, in order to compare traffic:

Using Charles Proxy with Unity

[Bunny83]

Well I see two issues here:

• None of your classes have the Serializable attribute.
• The fields in your class do not match the key names in your json. So it can not possibly match them.

"TranslationData" is not "data"
"Translations" is not "translations"
"TranslatedText" is not "translatedText"
"Model" is not "model"

[MrPapayaMan]

Thank you Bunny83