SAPUI5 Add column, editable property problem

Hello,

I am new to SAPUI5 and I have to make a column of a table editable.

I saw on the forum that I have to set the editable property to true but it does not work. The field is still in display

I use this

this.oUnitPriceText = new sap.ui.commons.TextField({editable: true}).bindProperty("value", {path: "JsonSes>UnitPrice", type: "app.model.type.Number"});

I checked in debug and the enable property is true...

Is there other property that I have to set? Could you please help me?

Thank you!

Marie