Android Back4app Query

Question

I have a table of inventory and I want to update quantity using the material name. Please suggest a query for updating.

final ParseQuery<ParseObject> query = ParseQuery.getQuery("Stock");
    query.whereEqualTo("material_name",materialname);
    query.getInBackground(materialname, new GetCallback<ParseObject>() {
        @Override
            public void done(ParseObject object, ParseException e) {
                if(e==null) {
                    String previous_quantity= object.getString("material_quantity");
                    Integer total=Integer.parseInt(previous_quantity)+Integer.parseInt(quantity_material);
                    object.put("material_quantity",total.toString());

                    object.saveInBackground(new SaveCallback() {
                        @Override
                        public void done(ParseException e) {

                        }
                    });
                }
                else
                {
                    Log.e("Error",e.getLocalizedMessage());
                    Toast.makeText(Addmaterial_activity.this,"Error"+e.getLocalizedMessage(),Toast.LENGTH_LONG).show();
                }
            }
        });

use findInBackground... not get. – letsCode Aug 01 '17 at 17:49 — letsCode, Aug 01 '17 at 17:49

score 1 · Answer 1 · answered Apr 26 '18 at 14:18

At Parse Server Docs, have a example to search in Background, like the code below:

ParseQuery<ParseObject> query = ParseQuery.getQuery("GameScore");
query.whereEqualTo("playerName", "Dan Stemkoski");
query.findInBackground(new FindCallback<ParseObject>() {
    public void done(List<ParseObject> scoreList, ParseException e) {
        if (e == null) {
            Log.d("score", "Retrieved " + scoreList.size() + " scores");
        } else {
            Log.d("score", "Error: " + e.getMessage());
        }
    }
});

You can check more about it at link below:

http://docs.parseplatform.org/android/guide/#basic-queries

Android Back4app Query

1 Answers1