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Build Json with Objects in Objects(JS)


By : Ikhmal Mahtar
Date : October 16 2020, 06:10 PM
I wish did fix the issue. What you are doing doesn't make sense at all. Your expected result is returned by just passing example to JSON.stringify
code :
JSON.stringify(example);


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How to build JSON object with nested JSON objects


By : Aroin
Date : March 29 2020, 07:55 AM
Hope that helps I am constructing a JSON object with nested objects in Javascript. Is there an easy way to do this in Javascript without using eval()?
code :
var a, data = {};
data[field_name] = { "answers" : { } };
a = data[field_name]["answers"];

for(var i=0; i<answers.length; i++){
   a[i] = answers[i];
}


console.log(data);

How to remove special characters from JSON stream, so that I can use gson API to convert JSON objects to JAVA objects?


By : Michael Leroux
Date : March 29 2020, 07:55 AM
wish help you to fix your issue It works perfectly as expected. There is no need to remove these special characters from JSON stream to convert it into Java object.
Please have a look at below sample code:
code :
BufferedReader reader = new BufferedReader(new FileReader(new File("json.txt")));
MyJSONObject data = new Gson().fromJson(reader, MyJSONObject.class);
System.out.println(new GsonBuilder().setPrettyPrinting().create().toJson(data));

class MyJSONObject {
    private String color;
    private String imageUrl;
    private String styleId;
    private String originalPrice;
    private String price;
    private String productUrl;
    private String percentOff;
    // getter & setter
}
{
  "color": "Arctic White",
  "styleId": "1788212",
  "originalPrice": "$64.95",
  "price": "$64.95",
  "percentOff": "0%"
}
BufferedReader reader = new BufferedReader(new FileReader(new File("resources/json29.txt")));

class MyJSONObject {
    private String color;
    private String imageUrl;
    private String styleId;
    private double originalPrice;
    private double price;
    private String productUrl;
    private double percentOff;
    // getter & setter
}

class MyJSONObjectDeserializer implements JsonDeserializer<MyJSONObject> {

    @Override
    public MyJSONObject deserialize(final JsonElement json, final Type typeOfT,
            final JsonDeserializationContext context) throws JsonParseException {

        JsonObject jsonObject = json.getAsJsonObject();

        MyJSONObject myJSONObject = new MyJSONObject();
        myJSONObject.setColor(jsonObject.get("color").getAsString());
        myJSONObject.setImageUrl(jsonObject.get("imageUrl").getAsString());
        myJSONObject.setStyleId(jsonObject.get("styleId").getAsString());
        myJSONObject.setProductUrl(jsonObject.get("productUrl").getAsString());

        try {
            String price = jsonObject.get("price").getAsString();
            String originalPrice = jsonObject.get("originalPrice").getAsString();
            String percentOff = jsonObject.get("percentOff").getAsString();

            myJSONObject.setPrice(Double.valueOf(price.substring(1)));
            myJSONObject.setOriginalPrice(Double.valueOf(originalPrice.substring(1)));
            myJSONObject.setPercentOff(Double.valueOf(percentOff.substring(0,
                    percentOff.length() - 1)));

        } catch (NumberFormatException e) {
            e.printStackTrace();
        }

        return myJSONObject;
    }
}

MyJSONObject data = new GsonBuilder()
        .registerTypeAdapter(MyJSONObject.class, new MyJSONObjectDeserializer()).create()
        .fromJson(reader, MyJSONObject.class);

System.out.println(new GsonBuilder().setPrettyPrinting().create().toJson(data));

Type of “id” (number) in user.json is not supported. Use objects or arrays of objects error when using json-server, why?


By : Paladin
Date : March 29 2020, 07:55 AM
To fix the issue you can do That error tells you what to do. Use objects or arrays of objects
Id should be object or arrays of objects, same for the rest of the properties.
code :
{
    "about" : [{
            "id" : 1,
            "name" : "Kajal Agarwal",
            "department" : "Information Technology",
            "college" : "Indian Institute of Engineering Science and Technology, Shibpur"
        }
    ],
    "subjects" : [{
            "title" : "Data Structures",
            "active" : true,
            "faculty" : "Prasun Ghosal",
            "notifications" : 4,
            "color" : "#9c27b0"
        }, {
            "title" : "Operating System",
            "active" : true,
            "faculty" : "Niharika Singh",
            "notifications" : 0,
            "color" : "#ffc107"
        }, {
            "title" : "Algorithms",
            "active" : true,
            "faculty" : "Debojit Mondal",
            "notifications" : 1,
            "color" : "#009688"
        }, {
            "title" : "Web Technologies",
            "active" : true,
            "faculty" : "Shantanu Saurabh",
            "notifications" : 2,
            "color" : "#ff5722"
        }, {
            "title" : "Formal Language and Automata Theory",
            "active" : true,
            "faculty" : "Sudhanshu Sekhar",
            "notifications" : 3,
            "color" : "#03a9f4"
        }, {
            "title" : "Digital Logic and Circuit Design",
            "active" : false,
            "faculty" : "",
            "notifications" : 0,
            "color" : "#9e9e9e"
        }
    ]
}

Build Json from an array of objects


By : TLangton
Date : March 29 2020, 07:55 AM
like below fixes the issue You could use reduce method which accepts as parameter a callback function.
Read more about reduce method here.
code :
let array=[
  { attribute: 'a', modifier: 121 },
  { attribute: 'b', modifier: 67 },
  { attribute: 'c', modifier: 121 },
  { attribute: 'd', modifier: 67 } 
];
let obj=array.reduce(function(obj,item){
  obj[item.attribute] = item.modifier;
  return obj;
},{});
console.log(obj);

CamelCase JSON WebAPI Sub-Objects (Nested objects, child objects)


By : Greg Smith
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You can configure JSON.NET to produce camel case names in your application startup. Code snippet from Scott Allen's post:
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