如何通过文档 ID 从 firestore 网站获取特定字段数据

Question

  auth.onAuthStateChanged(function(user){

if(user.uid){
    var db = firebase.firestore();


   document.getElementById("empUpd_email").value = user.email;
    


  db.collection("employee").doc(user.uid).get().then(result => {
        console.log(`${result.id} => ${result.data()}`);

document.getElementById('empUpd_fullname').value=result.fullName;

});
  
  
}else{
  
 
  //no user is signed in
}
});**strong text**

我想要性别价值 我是怎么得到的

数据库看起来像

地址“abdul”（字符串）bio“abdul”dob“2020-08-22”全名“abdul”性别“女”serName“abdul”

Answer 1

您可以只检索gender的值，使用与fullName相同的方式。
尝试这样的事情，

auth.onAuthStateChanged(function(user) {

  if (user.uid) {
    var db = firebase.firestore();
    document.getElementById("empUpd_email").value = user.email;
    db.collection("employee").doc(user.uid).get().then((result) => {
      const results = result.data(); 
      document.getElementById('empUpd_fullname').value = results.fullName;
      document.getElementById('empUpd_gender').value = results.gender; // Tag ID is a guess!
    });
  } else {
    //no user is signed in
  }
});

希望有用！

Answer 2

DocumentReference documentReference = fStore.collection("User").document(Objects.requireNonNull(fAuth.getCurrentUser()).getUid());
        documentReference.get().addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
            @Override
            public void onSuccess(DocumentSnapshot documentSnapshot) {
                if (documentSnapshot.exists()) {
                    profileName.setText(documentSnapshot.getString("Name"));
                    profileEmail.setText(documentSnapshot.getString("Email"));
                }
            }
        });