QT how to parse objects inside an array json

Question

I've got a JSON with the following structure

[{ "primul": "Thor", "alDoilea": "Odin", "alTreilea": "Loki" }, { "s": 1, "d": 7, "hp": 39 }, { "1": "sabie", "2": "scut", "3": "coif" } ]

Basically it's an array with x objects inside.

I've tried using QVariant to transform the data into a list and then map the elements of the list but it keeps throwing me cannot convert const char to int when using QVariantMap

Where am I going wrong?

Here is my code

QFile file2("../JsonExemplu/exampleArray.json"); if (!file2.exists()) { qDebug()<<"Fisierul nu a fost gasit "; exit(1); } if(!file2.open(QIODevice::ReadOnly)){ qDebug()<<"Nu s-a putut deschide fisierul JSON "; exit(1); } QTextStream file_text(&file2); QString json_string; json_string = file_text.readAll(); file2.close(); QByteArray json_bytes = json_string.toLocal8Bit(); auto json_doc=QJsonDocument::fromJson(json_bytes); if(!json_doc.isArray()){ qDebug() << "Formatul nu e de tip arrray."; exit(1); } QJsonArray json_array = json_doc.array(); if(json_array.isEmpty()){ qDebug() << "JSON gol"; exit(1); } QVariantList root_map = json_array.toVariantList(); QVariantMap stat_map = root_map["nume"].toMap(); QVariantMap stat_map2 = root_map["statistici"].toMap(); QVariantMap stat_map3 = root_map["inventar"].toMap(); QStringList key_list = stat_map.keys(); for(int i=0; i< json_array.count(); ++i){ QString key=key_list.at(i); QString stat_val = stat_map[key.toLocal8Bit()].toString(); qDebug() << key << ": " << stat_val; } }

You are right, the json had some errors. Updated with valid version. The problem still persists though — Adi
– Adi, Commented Jul 3, 2018 at 9:20

vahancho · Accepted Answer · 2018-07-03 10:23:40Z

The problem is that your convert QJsonArray to a list of variants. However you refer to that list as if it's a map - this will, of course, not compile. To fix the problem you need to use the appropriate QList API, i.e:

QVariantList root_map = json_array.toVariantList(); // This is a list, not a map! // There are three items in the list. // The code below can be put into a loop. QVariantMap stat_map = root_map.at(0).toMap(); QVariantMap stat_map2 = root_map.at(1).toMap(); QVariantMap stat_map3 = root_map.at(2).toMap(); QStringList key_list = stat_map.keys(); for (int i = 0; i< key_list.count(); ++i) { QString key = key_list.at(i); QString stat_val = stat_map[key.toLocal8Bit()].toString(); }

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