Binding of data on UI with model

Hi,

I have created a table on my UI to hold the data from the backend.

I used a odata read service to get this data.

I have enabled the defaultBindingMode to TwoWay.

Code snippet :

          var oModel = new sap.ui.model.odata.ODataModel(

//                                     

                    "proxy/http/spwdfvm1820.wdf.sap.corp:1080/sap/opu/odata/sap/ZPAL_SERVICE/",

                                                            false );

          oModel.setDefaultBindingMode("TwoWay");

          oTable.setModel(oModel);

          oTable.bindRows("/PF_ROOTS");

The issue now : 

Now, I am trying to update data on my UI(it is an editable table) and send the request to the backend for an update.

I am facing issues with the data binding with the UI and Model.

I have 4 rows in my table, and I am trying to update all 4 rows. The first row that gets the update retains the change, while the others are unable to.

Could you kindly let me know of how I could have the changed data persist on my UI which inturn will ensure it on the model, when the call goes to the backend.

Let me know if I have made myself clear.

Thanks and regards,
Pallavika.