How to access this JSON ( indented JSON )

Qjay

Hey , guys . Please help me on how to access this json elements ?
JSON :

{
	"batchcomplete": "",
	"query": {
		"searchinfo": {
			"totalhits": 1
		},
		"search": [{
			"ns": 0,
			"title": "Intro cryptography",
			"snippet": "Introduction to <span class='searchmatch'>Cryptography</span>  \n'''What is <span class='searchmatch'>Cryptography</span> ?'''\n",
			"size": 1815,
			"wordcount": 243,
			"timestamp": "2016-03-07T15:34:27Z"
		}]
	}
}

Elements that i want to access is : title , totalhits and snippet .
Here is what i have tried :
query.search["title"] but it was no good :/

mistralegna

Hello,

Assuming you have a QJsonDocument named doc describing the above json, you have to call :

QJsonDocument doc = QJsonDocument::fromJson(content); // content is the json to parse
QJsonObject root = doc.rootObject();
int totalHints = root["query"].toObject()["searchinfo"].toObject()["totalhits"].toInt();

For the elements title and snippet inside your search array, you can iterate over the array (root["query"].toObject()["search"].toArray()) and convert each item to a QJsonObject currentItem to access currentItem["title"]

Something like:

QJsonArray allSearches = root["query"].toObject()["search"].toArray();

// C++11

for(const auto& item : allSearches)
{
  QJsonObject currentItem = item.toObject();
  QString title = currentItem["title"].toString(); // Idem for snippet
}

Qjay

Hey @mistralegna thanks for the reply . I was actually looking for a way to do it in js. Can you give an example for js?

JKSH

@Qjay said:

I was actually looking for a way to do it in js. Can you give an example for js?

http://stackoverflow.com/questions/45015/safely-turning-a-json-string-into-an-object

Qjay

I know how to parse json , i want to access the elements in it after parsing it .

for example i have this JSON :

https://ghostbin.com/paste/j93oe

and i access it like this

 parse = JSON.parse(json);
                rev_id = parse.parse.revid; // gor revid
                console.log(rev_id);

                text = parse.parse.text["*"]; // got text

but i don't know how to access the type in my question

if possible can you write it here ?

SGaist

Hi,

From your original post, the search field is a list so you have to handle like one.

If you only have one element to parse:

query.search[0].title

otherwise use a for loop and go through it.

Qjay

Hey @SGaist I tried this simple js code

and it's giving me undefined in alert box .

    
        var http = new XMLHttpRequest();
        var json , parse , title ;

        

        http.onreadystatechange = function(){
            if(http.readyState == 4 && http.status == 200)
            { json = http.responseText;

                parse = JSON.parse(json);
                title = query.search[0].title;
                
            }
        };
        http.open('GET',"http://en.wikitolearn.org/api.php?action=query&list=search&srsearch=cryptography&format=json");
        http.send();


        alert(title);

SGaist

You put the result of JSON.parse in a variable called parse and then you try to get your data from a variable called query.

Qjay

Crap i mixed 2 codes. Sorry for that :m. Thank you everyone