AlpacaJS：选择

Question

我是AlpacaJS的新手并且疯狂地想弄清楚如何做一些简单的事情，例如用“选择”的值改变文本字段的内容。

代码看起来像

$("#form1").alpaca({
    "data": {
        "name": "Default"
    },
    "schema": {
        "title": "What do you think of Alpaca?",
        "type": "object",
        "properties": {
            "name": {
                "type": "string",
                "title": "Name"
            },
            "flavour":{
                "type": "select",
                "title": "Flavour",
                "enum": ["vanilla", "chocolate", "coffee", "strawberry", "mint"]
            }

        }
    },
    "options": {
        "helper": "Tell us what you think about Alpaca!",
            "flavour": {
                "type": "select",
                "helper": "Select your flavour.",
                "optionLabels": ["Vanilla", "Chocolate", "Coffee", "Strawberry", "Mint"]
            }            
        }
    },
    "postRender": function(control) {
        var flavour = control.childrenByPropertyId["flavour"];
        var name = control.childrenByPropertyId["name"];
        name.subscribe(flavour, function(val) {
            alert("Val = " + val);
            this.schema.data = val;
            this.refresh();
        });

    }    
});

我可以看到postRenderer中的函数被调用（因为我可以看到具有相关值的警报）但是（在这个阶段我可能已经死了）我无法用该值刷新文本字段。

干杯