javascript - 如何在Firestore文档ID的位置添加用户UID

我试图在Firebase / Firestore中代替自动生成的文档ID的用户UID，但由于此错误而无法获取

TypeError：firebase.auth（...）。currentUser为null

这是我的index.js文件：

// Firestore Cloud Database
var db = firebase.firestore();
function reg(){
//window.alert("Working..!");
const txtname = document.getElementById('txtuname').value;
const txtEmail = document.getElementById('txtemail').value;
const txtPass = document.getElementById('txtpass').value;
//window.alert(txtname);
 firebase.auth().createUserWithEmailAndPassword(txtEmail, txtPass).catch(function(error) {
        // Handle Errors here.


        var errorCode = error.code;
        var errorMessage = error.message;
        // [START_EXCLUDE]
        if (errorCode == 'auth/weak-password') {
          alert('The password is too weak.');
        } else {
          //alert(errorMessage);
        }
        console.log(error);
        // [END_EXCLUDE]

      });

 // Getting user id
var uid = firebase.auth().currentUser.uid;
//User Data Insertion
if(uid !=null){
 db.collection("users").doc(uid).add({
    UserName: txtname,
    Email: txtEmail,
    Password: txtPass
})
// .then(function(uid) {
//     console.log("Document written with ID: ", uid);
// })
.catch(function(error) {
    console.error("Error adding document: ", error);
});
}

}

最佳答案

由于firebase.auth().createUserWithEmailAndPassword(...)是异步函数，因此您必须等待其解析后才能继续。

您可以尝试以下方法：

// Firestore Cloud Database
var db = firebase.firestore();
function reg(){
    //window.alert("Working..!");
    const txtname = document.getElementById('txtuname').value;
    const txtEmail = document.getElementById('txtemail').value;
    const txtPass = document.getElementById('txtpass').value;
    //window.alert(txtname);
    firebase.auth().createUserWithEmailAndPassword(txtEmail,txtPass)
        .then(function (user) {
            // insert any document you want here
        })
        .catch(function(error) {
            // handle error here
        });

}

关于javascript - 如何在Firestore文档ID的位置添加用户UID，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/49996226/