Shippo：在其他函数中使用生成的交易的 label_url 变量

Question

我希望在 Node 中使用 Shippo 的 API 有更多经验的人可以帮助我解决这个问题。

我的最终目标是按下 angular 表单前端的按钮，创建装运交易，并使用交易标签 URL 创建自定义 PDF。除了将生成的标签 URL 推送到 PDF 模板外，一切正常。

首先，我将 Shippo's single click label creation example 粘贴到 Express POST 路由中。它工作得很好，生成的交易我可以通过 ping Shippo 的 API 查看最近的交易列表并查看最近的交易。

然后，我添加了 lines 102-111 of this code example 并用它替换了 instalabel 代码中的通用错误消息生成器，所以我当前的 app.js Shippo 交易逻辑如下所示：

shippo.transaction.create({
    "shipment": shipment,
    "carrier_account": "xxxxxxxxxxxxxxxxxxxxxx",
    "servicelevel_token": "ups_ground",
    "label_file_type": "PNG"
},function(transaction, err ){
            console.log("transaction : %s", JSON.stringify(transaction, null, 4));
            // print label_url and tracking_number
            if(transaction.object_status == "SUCCESS") {
                console.log("Label URL: %s", transaction.label_url);
                console.log("Tracking Number: %s", transaction.tracking_number);
                exports.label_url = transaction.label_url;
                exports.tracking_number = transaction.tracking_number;
            }else{
                //Deal with an error with the transaction
                console.log("Message: %s", transaction.messages);
            }

    });

我需要为刚刚创建的事务获取 label_url & tracking_number 并在另一个函数中使用它，但到目前为止我尝试的一切似乎都以错误告终像下面这样：

/src/app.js:88
    if(transaction.object_status == "SUCCESS") {
                  ^

TypeError: Cannot read property 'object_status' of null

我猜这是因为创建运输标签的功能没有导出 Shippo 发回的响应，所以我不能在其他功能中使用它...是准确的，还是我在这里吠叫错误的树？作为参考，这就是 Shippo 的回复应该是这样的]：

{
   "object_state":"VALID",
   "object_status":"SUCCESS",
   "object_created":"2014-07-25T02:09:34.422Z",
   "object_updated":"2014-07-25T02:09:34.513Z",
   "object_id":"ef8808606f4241ee848aa5990a09933c",
   "object_owner":"shippotle@goshippo.com",
   "was_test":true,
   "rate":"ee81fab0372e419ab52245c8952ccaeb",
   "tracking_number":"tracking_number_goes_here",
   "tracking_status":null,
   "tracking_url_provider":"",
   "label_url":"label_url_goes_here",
   "commercial_invoice_url": "",
   "messages":[

   ],
   "customs_note":"",
   "submission_note":"",
   "metadata":""
}

如何在 shippo.transaction.create 函数本身之外使用此响应中的值？

感谢阅读。

Answer 1

您传递给 shippo.transaction.create 中使用的回调的参数已反转其注入参数。应该是 (err, transaction) 而不是 (transaction, err)。或者，您可以链接 .then() 并传递仅接受 (transaction) 的回调并访问 transaction.messages.

中的任何错误消息

以下是撰写本文时最新版本 shippo-node-wrapper 的工作示例。

var shippo = require('./lib/shippo')('<API KEY>');

var addressFrom  = {
    "object_purpose":"PURCHASE",
    "name":"Ms Hippo",
    "company":"Shippo",
    "street1":"215 Clayton St.",
    "city":"San Francisco",
    "state":"CA",
    "zip":"94117",
    "country":"US", //iso2 country code
    "phone":"+1 555 341 9393",
    "email":"ms-hippo@goshippo.com",
};

// example address_to object dict
var addressTo = {
    "object_purpose":"PURCHASE",
    "name":"Mr Hippo",
    "company":"Happy Hippo",
    "street1":"965 Mission St",
    "street2":"Suite 425",
    "city":"San Francisco",
    "state":"CA",
    "zip":"94103",
    "country":"US", //iso2 country code
    "phone":"949-123-4567",
    "email":"mrhippo@goshippo.com",
    "metadata" : "Hippo T-Shirt Order #1043"
};

// parcel object dict
var parcel = {
    "length":"5",
    "width":"5",
    "height":"5",
    "distance_unit":"in",
    "weight":"2",
    "mass_unit":"lb",
};

var shipment = {
    "object_purpose": "PURCHASE",
    "address_from": addressFrom,
    "address_to": addressTo,
    "parcel": parcel,
    "async": false
};

shippo.transaction.create({
    "shipment": shipment,
        "carrier_account": "07280f4f96f34cc8b75e593c4835dc38",
        "servicelevel_token": "usps_priority",
        "label_file_type": "PNG"
}, function (err, transaction) {
    console.log("transaction : %s", JSON.stringify(transaction, null, 4));
    // print label_url and tracking_number
    if (transaction.object_status == "SUCCESS") {
        console.log("Label URL: %s", transaction.label_url);
        console.log("Tracking Number: %s", transaction.tracking_number);
    } else {
        //Deal with an error with the transaction
        console.log("Message: %s", transaction.messages);
    }
});

// OR 

shippo.transaction.create({
    "shipment": shipment,
        "carrier_account": "07280f4f96f34cc8b75e593c4835dc38",
        "servicelevel_token": "usps_priority",
        "label_file_type": "PNG"
}).then(function (transaction) {
    console.log("transaction : %s", JSON.stringify(transaction, null, 4));
    // print label_url and tracking_number
    if (transaction.object_status == "SUCCESS") {
        console.log("Label URL: %s", transaction.label_url);
        console.log("Tracking Number: %s", transaction.tracking_number);
    } else {
        //Deal with an error with the transaction
        console.log("Message: %s", transaction.messages);
    }
});

Shippo：在其他函数中使用生成的交易的 label_url 变量

Shippo: Using generated transaction's label_url variable in other functions

javascript

node.js

shippo