return {
    "widgettype": "Form",
    "options": {
        "width": "100%", "height": "100%",
        "url": "/discount/generate_qr.dspy",
        "method": "POST",
        "fields": [
            {"name": "valid_term", "label": "有效期", "uitype": "str"},
            {"name": "expired_date", "label": "促销失效日期", "uitype": "date"},
            {"name": "discount", "label": "折扣", "uitype": "float", "tip": "0<折扣<1"}
        ]
    }
}