On Mon, May 16, 2016 at 7:53 PM, Hamish Moffatt
<ham...@risingsoftware.com> wrote:
> On 17/05/16 08:24, Larry Martell wrote:
>>
>> I've see a lot of code that does something like this:
>>
>> QJsonDocument document = QJsonDocument::fromJson(jsonData);
>> QJsonObject object = document.object();
>> QJsonValue value = object.value("capData");
>>
>> But I don't want to hard code the keys - I want to pick up and store
>> whatever happens to be in the JSON file. How can I iterate through it
>> and do that?
>>
>> Also, what would be the best object to store this in so I can later
>> access it as I want to?
>>
>
> QJsonObject has iterator methods, and for each value you can check if it is
> itself an array or an object or a simple type (QJsonValue::isArray(),
> isObject(), isString() etc).
>
> As for another object, I can't think of another with this flexibility. Why
> not leave it in the QJson* objects?
My JSON file looks like this:
{
"capData": {
"host": "foo.bar.com",
"initial_port": "8000"
"secondary_port": "8001"
},
"django": {
"host": "baz.bar.com",
"port": "8004"
}
}
My code looks like this:
QFile file(QCoreApplication::applicationDirPath() + "/" + CONFIG_PATH);
QByteArray val;
QJsonDocument config_json;
QJsonObject config;
if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
val = file.readAll();
file.close();
config_json = QJsonDocument::fromJson(val);
config = config_json.object();
QJsonValue value = config.value("capData");
QJsonArray array = value.toArray();
foreach (const QJsonValue & v, array)
qWarning() << v.toObject().value("host").toString();
}
I never enter my foreach loop, so I wrote out each variable with qWarning().
When I print out val it has:
"{\n \"capData\": {\n \"host\": \"foo.bar.com\",\n
\"initial_port\": \"8000\"\n \"secondary_port\": \"8001\"\n
},\n \"django\": {\n \"host\": \"baz.bar.com\",\n
\"port\": \"8004\"\n }\n}\n"
But when I print out config_json I get:
QJsonDocument()
When I print out config I get:
QJsonObject()
When I print out value I get:
QJsonValue(undefined)
When I print out array I get:
QJsonArray()
I am probably doing something very simple and very stupid wrong, but I
don't know what it is.
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