Sugar ORM is not saving data into the database

am currently using Sugar ORM and Android Async Http Client for my Android application.

I read through the documentation of Sugar ORM and did exactly what is written there. My HttpClient is using the singleton pattern and provides methods for calling some APIs.

Now comes the bad part about it. I am not able to save the data persistently into my database which is created by Sugar ORM. Here is the method, that is calling an API:

  public void getAvailableMarkets(final Context context, final MarketAdapter adapter) {
    String url = BASE_URL.concat("/markets.json");
    client.addHeader("Content-Type", "application/json");
    client.addHeader("Accept", "application/json");

    client.get(context, url, null, new JsonHttpResponseHandler() {

        @Override
        public void onSuccess(int statusCode, Header[] headers, JSONArray response) {

            Log.i(TAG, "Fetched available markets from server: " + response.toString());


            Result<Markets> productResult = new Result<Markets>();
            productResult.setResults(new Gson().<ArrayList<Markets>>fromJson(response.toString(),
                    new TypeToken<ArrayList<Markets>>() {
                    }.getType()));
            ArrayList<Markets> marketsArrayList = productResult.getResults();

            // This lines tells me that there are no entries in the database
            List<Markets> marketsInDb = Markets.listAll(Markets.class);

            if(marketsInDb.size() < marketsArrayList.size() ||
                    marketsInDb.size() > marketsArrayList.size()) {

                Markets.deleteAll(Markets.class);

                for(Markets m : marketsArrayList) {
                    Markets market = new Markets(m.getId(), m.getName(), m.getChainId(), m.getLat(),
                            m.getLng(), m.getBusinessHourId(), m.getCountry(), m.getZip(), m.getCity(),
                            m.getStreet(), m.getPhoto(), m.getIcon(), m.getUrl());

                    market.save();

                    adapter.add(market);
                }

                adapter.notifyDataSetChanged();

            } 

            List<Markets> market = Markets.listAll(Markets.class);
            // This lines proves that Sugar ORM is not saving the entries   
            Log.i(TAG, "The market database list has the size of:" + market.size());
        }
    });
}

his is what Logcat is printing:

D/Sugar: Fetching properties I/Sugar: Markets saved : 3 I/Sugar: Markets saved : 5 I/RestClient: The market database list has the size of:0

Also I took a look at the Sugar ORM tag at stackoverflow, but no answers or questions could give me a hint on how to solve that problem. I am a newbie to the android ecosystem and would love any help of you guys to solve this problem. Thanks in advance

[rezanahardani]

here is resolved… https://stackoverflow.com/a/44619474/7577642

[xudshen]

ok… try this:

step1: //add @Expose on every field to be deserialized @SerializedName(“id”) @Expose private Long mId; @Expose private String name;

step2: productResult.setResults((new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create()).<ArrayList<Markets>>… tell Gson exclude fields without @Expose annotation.

the id field will be ignored since it has no annotation like @Expose