Parse json string to QMap

[SGaist]

Hi,

What exactly is your doubt ?

[Rua3n]

@SGaist how to properly construct the QMap from this json string.

[SGaist]

Ok, I see. Your main issue is that you are doing your work always in the same map. Once you have an object, you have to create a new map, fill it and then assign it to the current one. But ! You can't assign a QMap value to your QMap<QString, QString>. So your original plan can't work.

That's why QJsonObject as the toVariantMap function.

You have to change your design to work with QVariantMap.

[Rua3n]

@SGaist but im trying to build a QMap<Qstring, QString> not QVariant

[SGaist]

Then I may have misunderstood your current issue.

Can you show an example of the input you get and the output you expect to build from it ?

[Rua3n]

@SGaist

QMap<QString, QMap<QString, QMap<QString, QString>>> m = {
        {"files", {
            {"App.exe", {{"hash", "f976"}}},
            {"D3Dcompiler_47.dll", {{"hash", "954f"}}},
            {"generic", {
                {"qtuiotouchplugin.dll", {{"hash", "ed72"}}}, {"test", {{"hash", ""}}},
            }}
        }}
    };

There's another way to convert the json back to object/array?

[SGaist]

You can't dynamically create that kind of class in C++. However, if you have such a fixed known structure, then my remark about creating a new QMap each time you have to recurse.

[Rua3n]

@SGaist example please

[SGaist]

@Rua3n example of what ?

[SGaist]

I just realized something, based on what you want, you might want to check hlohmann json library. It might be better suited to your needs.

[JonB]

@SGaist
Blimey! From where I am/OP is now, I would just work with QJson and QVariantMap!

[SGaist]

@JonB said in Parse json string to QMap:

@SGaist
Blimey! From where I am/OP is now, I would just work with QJson and QVariantMap!

I already suggested that, but it seems not to be an option.

[JonB]

@SGaist
I know, I was agreeing with you :)

No idea how much JSON data OP has to parse. They might read it in as QVariantMap and transform in code to some specific QMap<..., ...> if demanded. Not the fastest, but might be quickest if OP wants to write it. Integrating the code you referenced has its own overheads :)