id

The value of the ID of the Model. This field is available only if the id is defined in the Model configuration. See the following example.

Example - configure the Model id

<script>
    var Product = kendo.data.Model.define( {
      id: "ProductID", // the identifier is the "ProductID" field (declared below)
      fields: {
        /* name of the field - ProductID */ 
        ProductID: { editable: false, nullable: true },
        /* name of the field - ProductName*/ 
        ProductName: { type: "string", defaultValue: "<empty>"}
      }
    });
    var product = new Product({
      ProductID:3,
      ProductName: "Milk"
    });

    /* The result can be observed in the DevTools(F12) console of the browser. */  
    console.log(product.ProductID); // // outputs "3" which is the ProductID value
    /* The result can be observed in the DevTools(F12) console of the browser. */
    console.log(product.idField); // outputs "ProductID" which is the name of the 'id' field
</script>

Example - define the model.id in dataSource schema

<script>
  var crudServiceBaseUrl = "https://demos.telerik.com/kendo-ui/service",
      dataSource = new kendo.data.DataSource({
        transport: {
          read:  {
            url: crudServiceBaseUrl + "/Products",
            dataType: "jsonp"
          }
        },
        pageSize: 20,
        schema: {
          model: {
            id: "ProductID", // the identifier of the model
            fields: {
              ProductID: { editable: false, nullable: true },
              ProductName: { validation: { required: true } },
              UnitPrice: { type: "number" },
              Discontinued: { type: "boolean" },
            }
          }
        }
      });
</script>