Add json values in to the list of object-CodePudding

How I can get all the values in this JSON and add all the value in to the list of object in the dart?

 "data": [
        {
            "$id": "2",
            "serviceId": 1017,
            "name": "اکو",
            "code": "235",
            "price": 1562500,
            "isDefault": true,
            "transportCostIncluded": false,
            "qty": 0,
            "minQty": 1,
            "maxQty": 2,
            "description": "یک دستگاه اکو به همراه دو باند و یک عدد میکروفن (تامین برق بعهده پیمانکار می باشد).",
            "contractorSharePercent": 65,
            "unitMeasureId": 7,
            "unitMeasureName": "هر 60 دقیقه",
            "superContractorsId": null
        },
       
    ],

like this var list = ["2",1017,....]

CodePudding user response：

Assuming you've a JSON file, which you may have parsed like this:

String json = await rootBundle.loadString('file_name.json');
var response = jsonDecode(json);

This is how you can do it:

List<dynamic> jsonData; //similar to var jsonData = [something, something, ...]

//traversing through each value in the key value arrangement of the json
for (var k in response.values) {
   jsonData.add(k);  //adding each value to the list
}

After the loop ends, jsonData will have all the values of your JSON file.

CodePudding user response：

It's important for you to know that even if you put the keys on a list, they won't necessarily be in order, because of the way maps work.

Assuming your json is a map and not a json string, you could put all of the values on a list like so:

var myList = (jsonObject['data'] as List).fold<List>(
  [], 
  (prev, curr) => [...prev, ...curr.values]
);

if you were talking about a json string:

Map<String, dynamic> jsonObject = jsonDecode(jsonString);

CodePudding user response：

For simplicity, lets assume this json is unparsed in a string.

(1) Assuming the code snippet you added is a string && is valid json you can do as follows :)

import 'dart:convert';

void main() {
  var x = json.decode('''
      {
        "data": [
            {
                "hello": "2",
                "serviceId": 1017,
                "name": "اکو",
                "code": "235",
                "price": 1562500,
                "isDefault": true,
                "transportCostIncluded": false,
                "qty": 0,
                "minQty": 1,
                "maxQty": 2,
                "description": "یک دستگاه اکو به همراه دو باند و یک عدد میکروفن (تامین برق بعهده پیمانکار می باشد).",
                "contractorSharePercent": 65,
                "unitMeasureId": 7,
                "unitMeasureName": "هر 60 دقیقه",
                "superContractorsId": null
            }
        ]
      }
  ''');
  print(x);
  List<dynamic> listOfObjects = (x['data'] as Iterable<dynamic>).toList();

  /// this is just gonna be a list of all of your object.
  print(listOfObjects);

  List<dynamic> listOfValues = (x['data'] as Iterable<dynamic>).map((_object) {
    return (_object as Map<String, dynamic>).values.toList();
  }).toList();

  /// this is gonna be a 2d array here,
  print(listOfValues);
}

Hope This helped out:)

Also json here comes from import 'dart:convert';