How to remove extra json object in flutter

Question

This is my cart list and I'm converting into JSON object to send at the server

   Map<String,dynamic> str={'cart':cartList};
      cartitem = jsonEncode(str);

doing something like this but it is adding extra JSON object and this is invalid JSON form. then how can I remove extra JSON object.

 {
    {"cart":[
    {
    "cartid":2,
    "pid":"342702",
    "merchantId":"MER-07156",
    "hashkey":"7087fea71afc963d6dc3fa04944008ec",
    "productname":"Scheduling Product - Edit Please",
    "product_image":"Scheduling Product - Edit Please",
    "shipping_price":"0.00",
    "state_tax_rate":"0.0",
    "taxamt":"0.00",
    "discountamt":"0.0",
    "price":"10.00",
    "pricewithattr":"17.00",
    "quantity":"18",
    "totalamount":"306.00",
    "taxvalue":"0.0",
    "attribute_array":"[{\"attributeid\":\"20796\",\"attributename\":\"Black\",\"groupname\":\"Color\",\"groupid\":\"3012\"},{\"attributeid\":\"20798\",\"attributename\":\"Silk\",\"groupname\":\"Cloth\",\"groupid\":\"3013\"},{\"attributeid\":\"20800\",\"attributename\":\"small\",\"groupname\":\"Size\",\"groupid\":\"3014\"}]",
    "is_free":"0",
    "is_payable_later":"0",
    "isattrpresent":"1"
    }
    ]
    }}

did you try this? cartitem.replace("{{","{"); cartitem.replace("}}","}"); — Muhammad Imran
– Muhammad Imran, Commented Apr 24, 2019 at 11:45

Richard Heap · Accepted Answer · 2019-04-24 12:46:24Z

1

Strange, because this code:

  Map<String, dynamic> str = {
    'cart': [1, 2, 3]
  };
  String cartitem = jsonEncode(str);
  print(cartitem);

which does basically the same thing, produces valid json:

{"cart":[1,2,3]}

Try debugging by just json encoding one of the cart members, replacing the cart members by something simple (like an integer, above) until you find the issue.

answered Apr 24, 2019 at 12:46

Richard Heap

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1 Comment

Farhana Naaz Ansari Over a year ago

I tried to debug and found that jsonEncode was adding an extra object so I converted cartiem into jsonEncode prior to adding into the map.

Enis Erkaya · Accepted Answer · 2019-04-24 13:38:41Z

0

Your JSON is not right structure. Did you try to parse it any online converter?

You should remove { character before "cart" and remove } character the end of json.

answered Apr 24, 2019 at 13:38

Enis Erkaya

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3 Comments

Richard Heap Over a year ago

The JSON is indeed invalid, but was supposedly created by jsonEncode. Is this a serious bug in jsonEncode or some other error. We don't know yet.

Farhana Naaz Ansari Over a year ago

@RichardHeap exactly may be the serious bug in jsonEncode i tried this by adding double quotes in the cart key and it works.

Farhana Naaz Ansari Over a year ago

@RichardHeap see my answer how I get the expected result. I don't know the way I used is correct or not.

Farhana Naaz Ansari · Accepted Answer · 2019-04-25 05:21:41Z

I tried to debug and found that jsonEncode was adding an extra object so I converted cartiem into jsonEncode prior to adding into the map.

  var cartitems2=cartList;
  Map<String,dynamic> str={'"cart"':json.encode(cartitems2)};
  cartitem = str.toString();
  debugPrint('CART :-----${cartitem}');

Expected Result

{
    "cart": [
        {
            "cartid": 22,
            "pid": "342702",
            "merchantId": "MER-07156",
            "hashkey": "7087fea71afc963d6dc3fa04944008ec",
            "productname": "Scheduling Product - Edit Please",
            "product_image": "Scheduling Product - Edit Please",
            "shipping_price": "0.00",
            "state_tax_rate": "0.0",
            "taxamt": "0.00",
            "discountamt": "0.0",
            "price": "10.00",
            "pricewithattr": "26.00",
            "quantity": "10",
            "totalamount": "260.00",
            "taxvalue": "0.0",
            "attribute_array": [
                {
                    "attributeid": "20794",
                    "attributename": "Red",
                    "groupname": "Color",
                    "groupid": "3012"
                },
                {
                    "attributeid": "20799",
                    "attributename": "Cotton",
                    "groupname": "Cloth",
                    "groupid": "3013"
                },
                {
                    "attributeid": "20800",
                    "attributename": "small",
                    "groupname": "Size",
                    "groupid": "3014"
                }
            ],
            "is_free": "0",
            "is_payable_later": "0",
            "isattrpresent": "1"
        }
    ]
}

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