SAPUI5 binding issue when JSON model updated

Hi,

I have the following challenge:

I have a product selection page and a shopping basket page. The content of the shopping basket is in the session (storage) as an array. When I select a product on the selection page, it should be added to the shopping basket. The problem is that the shopping basket doesn't get updated, I don't see the products which I add.

When I click on the Add button on the selection page, I call a function which adds an item to my shopping basket array. So far so good.

On the shopping basket page I get the array and create a JSON from it. I set this JSON data to my model. Once I have a model, I bind it to a table. The binding works when I start up the application, but when I add additional products to the shopping basket, I don't see them on my shopping basket page.

The array is ok, I see the new items added.

The JSON is ok, I see the new items added.

The model is ok, I see the new items added.

Still, the binding is not updated.

In the product selection function:

jQuery.sap.storage.put("order_matnr", oArray_order_matnr);

I build my array. It looks like ["000000000000020104","000000000000020105","000000000000020104","000000000000020295"]

In the shopping basket view:

var mySelectedProductnames=jQuery.sap.storage.get("order_matnr");

    var aData = new Array();

    if (mySelectedProductnames!= null) {

      var len = mySelectedProductnames.length;

      for (var i = 0; i < len; i++) {

        aData.push({

            matnr: mySelectedProductnames[i],

        });

      };

    };

    var oModel_orderjson = new sap.ui.model.json.JSONModel();

    oModel_orderjson.setData({modelData : aData});

    console.log(oModel_orderjson); //my model looks good, updated after each additional product ordering

Then I use oTable_orderoverview_self.bindItems

and

oTable_orderoverview_self.setModel(oModel_orderjson);

It all works for products which are in the array (in the storage) when I reload the application. But when I add products during using the application, I manage to update the array, the JSON, the model, but not the table.

Any advice is appreciated!

Thanks,

Tamas