Question Re: Two-Way Binding with createEntry SAPUI5 in Technology Q&A

Two-Way Binding with createEntry SAPUI5

former_member254939 — Sun, 24 Apr 2016 13:24:57 GMT

I am trying to use Two-Way binding with a v2 OData model. In the route matched of the create view I have the following code.


this.getOwnerComponent().oWhenMetadataIsLoaded.then(function() {
  var oEntry = oView.getModel().createEntry("/ContactCollection");
  oView.setBindingContext(oEntry);
}.bind(this));


  }.bind(this));

At runtime i call the screen and update a value in the create view that is "bound" to the model.

Then in my save function I have been executing the following line in the debugger.


this.getView().getBindingContext().getObject()

The output is a blank entity will all properties set to "undefined".

While searching I found this page

So i implemented line


oView.getModel().setDefaultBindingMode(sap.ui.model.BindingMode.TwoWay);

in the route matched function above with same results.

I have also tried using


oView.unbindElement();

from the discussion here

Any help would be appreciated.

Re: Two-Way Binding with createEntry SAPUI5

junwu — Mon, 25 Apr 2016 04:00:47 GMT

how you store the model? with name?

Re: Two-Way Binding with createEntry SAPUI5

former_member254939 — Mon, 25 Apr 2016 12:16:40 GMT

I am using an unnamed model so my binding looks like.


value="{path :'firstName',type: 'sap.ui.model.odata.type.String'}"

Re: Two-Way Binding with createEntry SAPUI5

junwu — Mon, 25 Apr 2016 13:45:10 GMT

when you call

oView.getModel().setDefaultBindingMode(sap.ui.model.BindingMode.TwoWay); ? before setting binding context?or after?

Re: Two-Way Binding with createEntry SAPUI5

Former Member — Mon, 25 Apr 2016 13:54:17 GMT

oView.getModel().setDefaultBindingMode(sap.ui.model.BindingMode.TwoWay);

Did you try setting the model's default binding mode when it was created instead of in the view?

Re: Two-Way Binding with createEntry SAPUI5

former_member254939 — Mon, 25 Apr 2016 14:09:43 GMT

I did. When I tried it it looked like.


this.getOwnerComponent().oWhenMetadataIsLoaded.then(function() {
  oView.getModel().setDefaultBindingMode(sap.ui.model.BindingMode.TwoWay);
  var oEntry = oView.getModel().createEntry("ContactCollection");
  oView.setBindingContext(oEntry);
 });


  }.bind(this));

But still did not work

Re: Two-Way Binding with createEntry SAPUI5

former_member254939 — Mon, 25 Apr 2016 14:11:52 GMT

This worked. I passed in the default binding mode on create to be set to TwoWay using the documentation found here.

Not sure why the function call did not work.