Question

您好我想在Node.js环境中使用Cloud Functions for Firebase为用户订阅特定主题，我已关注此视频https://www.youtube.com/watch?v=GNR9El3XWYo，其中Firebase专家展示了如何订阅用户的时间写入Firebase中的节点，这是我的完整代码：

//For subscriptions
exports.privateEventSubs = functions.database.ref("Events/{eventID}/guest_mod/assistants/{guestEmail}").onWrite((event) => {
    let data = event.data;
    let eventID = data.ref.parent.parent.parent.key;
    console.log("The eventID is: " + eventID);
    let guestEmail = data.ref.key;
    console.log("The guestEmail is: " + guestEmail);

    //Add or remove a subscription
    let action = data.exists() ? "batchAdd" : "batchRemove";
    console.log("The action is: " + action);


    //Get the device token from each user
    admin.database().ref("Users/" + guestEmail + "/chat_data/firebaseToken").once("value").then(function (snapshot) {
        console.log("The user token is: " + snapshot.val());

        //Send messages to users that have subscribed to that event
        functions.config().firebase.credential.getAccessToken().then(function (oauthToken) {
            console.log("The oauthToken is: " + oauthToken.access_token);
            //Lets configure and request
            request({
                url: "https://iid.googleapis.com/iid/v1:" + action, //URL to hit
                method: 'POST',
                json: true,
                headers: {
                    Authorization: "Bearer " + oauthToken.access_token,
                    access_token_auth: true,
                },
                body: {
                    to: "/Events/" + eventID,
                    registration_tokens: snapshot.val()
                }
            }, function (err, res, body) {
                if (err) {
                    console.log(err);
                } else {
                    console.log(res.statusCode, body);
                }
            });
        });
    });
});

我得到的错误就是这个：

   400 { error: 'InvalidListOfTokens' }

我做错了什么？请帮忙！：（

Answer 1

在这种情况下，您似乎正在为registration_tokens键传递单个值。根据{{3}}，这应该是一个数组。

因此，将registration_tokens: snapshot.val()更改为registration_tokens: [snapshot.val()]会将请求置于API期望的格式中。

Firebase的云功能 - 为用户订阅主题

1 个答案: