Using Qtfirebase

[shariatraad]

Hello :) I've been able to import Qtfirebase in my Qt project and I can run my app without crashing. I just have one "big" question. How can I use Qtfirebase different functions in my project? for example if I want to write something from my app in my firebase console. Are there any documentations that I can refer to so I can get to know these functions?

[isdsi]

What do you mean 'write something from my app in my firebase console'? Is it the 'firebase cloud messaging'?

[shariatraad]

sorry for my bad initial explanation. I meant if I want to store some data from my app on my database. For example on my app I'm using phones camera and currently the camera output is stored on phone's internal storage. what if I want to store it on firebase database (cloud or real-time) instead of phone's storage?

[isdsi]

Yes, you can do it. The QtFirebaseExample has 'firebase database' example. Please, check the first big menu 'database'

[isdsi]

If you use the firebase database, you can insert some data to it serverlessly.

[shariatraad]

Thank you again for your answer and your time :) Are you referring to Database.qml in QtFirebaseExample? If so I should also mention that in my application I'm using c++ classes and not qml types. That's why I asked at very beginning for any sort of documentations that I can have access to.

[isdsi]

Yes. You can access with 'Database.qml'. I think QtFirebase is for mobile application(android/ios). If you want to develop an mobile application, you may use qt qml. But If you know only c++, you can learn one time 'c++ class to qml type'.

https://doc.qt.io/qt-5/qtqml-cppintegration-contextproperties.html

[shariatraad]

I see. thank you so much. I have already built my phone application for android using only c++ classes. I will check the link you've provided, at first glance I can see that it's very helpful! Just to confirm there is no way to access QtFireBase database directly from c++ classes and it is only accessible through QML types right?

[larpon]

All QML types are usable in C++. They're defined in C++ - thus also usable from C++?

[larpon]

So everything you can do in QML you can do in C++.

[shariatraad]

Hello Larpon. Thanks for the reply. Yes QML types are defined in c++ as well. That's why I was a bit confused when It was suggested to integrate c++ into QML. (Which is also fine but only if there is not an equivalent c++ class/function for that particular QML type or vice versa). Which brings me back to the same question that I asked above :) How can I get information about the Qtfirebase c++ classes and functions? Are there any particular documentations for that?

[larpon]

Ah. Well QtFirebase is really just a thin wrapper layer over Google's Firebase C++ SDK. So the official firebase C++ documentation and some grep'ing around the classes in /src is currently the only thing I can offer you as documentation or guidance.

So for example if you need to know how QtFirebase Database works:

• Start here
• Then see what we've implemented (wrapped) here

... and qtfirebase.h is a singleton wrapping firebase::App

We currently haven't got resources for much more than DIY research and discovery :)

And please contribute back if you implement something we've missed! Better documentation is also welcome!

[shariatraad]

Thank you so much Larpon for the detailed explanation! That's exactly what I was looking for! After I manage to implement something worthy to share I will definitely post it so others can use it as well!

[larpon]

Perfect!