【发布时间】:2017-06-22 14:41:43
【问题描述】:
我正在创建一个社交应用程序,朋友们可以在其中通过他们的通讯录找到彼此。本质上,我有两个长长的电话号码列表,我想使用 firebase-cloud-function 查找两个列表中存在的所有号码。
为此,我将用户的所有联系信息发布到 Firebase 实时数据库并触发云功能 (.onWrite)。云函数获取刚刚发布的所有电话号码,然后检索我的数据库中所有经过验证的电话号码,然后需要交叉引用两个列表以查找所有匹配项。
这是我的代码...
exports.crossReferenceContacts = functions.database.ref('/cross-ref-contacts/{userId}').onWrite(event => {
//if it already existed then this function triggered beacuse we are calling set(null) and thus we dont want to proceed
if (event.data.previous.exists()) {
console.log("PREVIOUSLY EXISTED. RETURN NULL!!!");
return null;
}
const userId = event.params.userId;
const userContacts = event.data.val();
var contactsOnPhone = [];
var contactsVerifiedInDatabase =[];
var matchedContacts= [];
for (var key in userContacts){
let contact = new Object();
contact.contactName = userContacts[key];
contact.number = key;
contactsOnPhone.push(contact);
};
var verifiedNumsRef = event.data.adminRef.root.child('verified-phone-numbers');
return verifiedNumsRef.once('value', function(snapshot) {
const verifiedUsers = snapshot.val();
for (key in verifiedUsers){
const number = key
const userInfo = verifiedUsers[key];
for (key in userInfo){
const uid = key;
const username = userInfo[key];
var verifiedContact = new Object();
verifiedContact.name = username;
verifiedContact.uid = uid;
verifiedContact.number = number;
contactsVerifiedInDatabase.push(verifiedContact);
};
};
var verifiedNumbers = contactsVerifiedInDatabase.map(function(x){
return x.number;
});
var contactNumbers = contactsOnPhone.map(function(x){
return x.number;
});
//THIS LINE DOES NOT EVEN GET LOGGED UNLESS I COMMENT OUT THE FOR-LOOP BELOW, ONLY THEN DOES THIS LINE GETS LOGGED
console.log('got ', verifiedNumbers.length, ' verified numbers along with', contactsVerifiedInDatabase.length, ' verfieid contacts. Also got', contactNumbers.length, ' phone numbers along with ', contactsOnPhone.length, ' phone contacts');
for (i = 0; i < contactNumbers.length; i++){
console.log("i = ", i);
if (verifiedNumbers.includes(contactNumbers[i])) {
console.log("GOT A MATCH WITH # ", contactNumbers[i]);
} else {
console.log("No mATCH FOR # ", contactNumbers[i]);
};
};
return null;
});
});
由于某种原因,当我在终端中运行 firebase functions:log 时,日志不完整。这是日志...
为什么每次循环都没有打印日志?它不应该一直打印 i = 0 到 i = 409 吗?为什么总是从 393 开始?而且该功能正在以“超时”状态完成,这是为什么呢?
【问题讨论】:
-
我注释掉了所有内容,只是尝试运行
for(i = 0; i < 500; i++){console.log(i);};,但firebase日志仍然只显示466到499。每次它只记录最后33个“console.log” -
试试这个命令
firebase functions:log -n 500 -
成功了!谢谢你。你在哪里读到如何做到这一点?我在 Firebase 文档中找不到任何内容
-
请看答案
标签: node.js firebase firebase-realtime-database