Adding items to JS list which is used as a model

[maydin]

I have a ListView and its model is a JavaScript list. For example if I declare it as property var options: [{text: "ttt"}] and use it in delegate as modelData.text there is no problem in first initialization.

But when i want to add an item to that list using a button etc. it doesnt do anything. I call options.push(item) but neither it gives an error nor updates view.

I may use QML item models but this is easier since i get this input from a JSON source.

[ODБOï]

Hi,
this can help for the data persistence : https://stackoverflow.com/questions/48730166/how-to-save-and-restore-the-content-of-a-listmodel

you can parse your json file first, then you create a ListModel with the data (methode in the first link)

then you add data using append() http://doc.qt.io/qt-5/qml-qtqml-models-listmodel.html#append-method

and save on exit

[maydin]

@LeLev I know how to do it like in link you gave. He uses for loop to add them to a ListModel: for (var i = 0; i < datamodel.length; ++i) dataModel.append(datamodel[i])

But I can use a simple JavaScript list as a model and i want to push items to that directly. But model doesnt update when use list.push().

If i cannot find a solution i have to use that ListModel way ofcourse.

[Yaswanth]

@maydin said in Adding items to JS list which is used as a model:

property var options:

Declare as

property var options:["ttt"]

To add items use

options.push("Some Text")

[maydin]

@Yaswanth Read my first post. I did same but it doesnt update view.

[jiancaiyang]

@maydin Pure Javascript array could not be models easily, instead, use ListModel, or use C++ QStringList or other C++ data structure.

[Yaswanth]

@maydin I checked it again, Lisview is not updating after adding elements. But if you reassign the model to the listview, it gets updated.
One more way is using ListModel in qml.

[maydin]

If you dont need to change model, then using JS models is easiest solution. But if you can change model then you have to use ListModel or C++ Model.

I think we reached the final conclusion. But not sure should I mark as solved.