Solved Need help in rapidjson object parsing

cocos2d-x C++
1

Hi,

this is my first time I’m using rapidjson.

I successfully parse the following rapidjason

{
“hello”: “world”,
“t”: true ,
“f”: false,
“n”: null,
“i”: 123,
“pi”: 3.1416,
“a”: [1, 2, 3, 4]
}

But I have problem in parsing json object.

I have following json string

{“employees”:[
{“firstName”:“John”, “lastName”:“Doe”},
{“firstName”:“Anna”, “lastName”:“Smith”},
{“firstName”:“Peter”, “lastName”:“Jones”}
]}

please tell me how to parse it.

Thanks

2

Hello @NileshShripal try this,

std::string data = {"employees":[
                                                       {"firstName":"John", "lastName":"Doe"},
                                                       {"firstName":"Anna", "lastName":"Smith"},
                                                       {"firstName":"Peter", "lastName":"Jones"}
                                                       ]
    }
    rapidjson::Document document;
    if(!parseJsonData(data, document)){
        // parse error
        log("Parse Error Check format of Json, or response");
        return ;
    }
    
    
    if(document.IsObject()){
        if(document.HasMember("employees")){
            const rapidjson::Value& employeeArray = document["employees"];  // you are missing this
            assert(employeeArray.IsArray());
            for (rapidjson::SizeType i = 0; i < employeeArray.Size(); i++)
            {
                const rapidjson::Value & atomicObject  = employeeArray[i];
                std::string firstName;
                std::string lastName;
                if(atomicObject.HasMember("firstName")){
                    const rapidjson::Value & name  = atomicObject["firstName"];
                    firstName = cocos2d::Value(name.GetString()).asString();

                }
                
                if(atomicObject.HasMember("lastName")){
                    const rapidjson::Value & name  = atomicObject["lastName"];
                    lastName = cocos2d::Value(name.GetString()).asString();
                    
                }
                log("Full Name is :---  %s %s",firstName.c_str(), lastName.c_str());
            
            }
        }
    }

where data is the data retrieved by API callback.

Regards
Ajay

3

Hi,

Thanks for your reply.

I’ll try it.

and tell u.

Thanks.

4

Hi Lazy_Gamer ,

I’m getting the following error:-

Assertion failed: (employeeArray.IsArray()), function onHttpRequestCompleted,

5

Assertion is failing make sure the response json is in correct format, check online there are many online jsonformatters available. Or if you have the API available publicly you can paste it here so that i can test it aswel

6

ok

thanks.

7

Thanks Problem solved. You are correct.

Thanks

8

@Lazy_Gamer
Hi, im trying to parse json data using rapid miner too in cocos2dx. Im stuck at here. Really dont know whats going on. Hope u could help me please :slight_smile:

Ive imported the libraries as following:

#include “external/rapidjson/reader.h”
#include “external/rapidjson/writer.h”
#include “external/rapidjson/document.h”
#include “external/rapidjson/stringbuffer.h”

Error: No matching member function for call to ‘Parse’

9

Hello @karatekun,

Your imports looks good. Include#include "json/stringbuffer.h" aswell, I am using cocos2d-X v 3.10 as of now for our game.

////////////// Parsing Json Data into a document
bool MyClient::parseJsonData(string data, rapidjson::Document& document){
    const char * jsonText = data.c_str();

    document.Parse<0>(jsonText);
    if (document.HasParseError()) {

        return false;
    }
    return true;
}

hope this helps you.

1 Like
10

@Lazy_Gamer It works :grinning: Tq so much. I was feeding the function the wrong data this whole time :weary: Silly me